Back Cover
Back Cover
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| New Green Metal brushed back Battery Cover Case Door for Phone 4S | |
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$10.99 Time Remaining: 30m Buy It Now for only: $10.99 Buy It Now |
| LCD Touch Screen Full Assembly Back cover Housing for iPhone 4GS 4S YELLOW | |
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$37.59 (1 Bid) Time Remaining: 30m |
| Hellokitty Ice Cream 3D Cake Hard Back Cover Case for iPhone 4 4G 4S Red WC68 | |
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$0.01 Time Remaining: 30m |
| Resin Bird Flower Sripng Coming Gem Pearl Bling Back iPhone 4S Clear Case Cover | |
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$14.99 Time Remaining: 30m |
| Hellokitty Cute 3D Back Silicone Case Cover Skin For Apple Iphone 4 4G 4s Yellow | |
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$0.99 Time Remaining: 30m |
| Brown back case cover for Nokia 5800 + stylus Touch pen | |
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| Gameboy Soft Silicone Back Case Cover Skin For Apple iPhone 4S 4 4G CDMA White | |
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$0.01 Time Remaining: 31m |
| 1PC Cute 3D Pig Crown Silicone Case Back Cover Skin for Apple iPhone 4G 4S BLAC | |
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$0.01 Time Remaining: 31m |
| Luxury Steel Aluminum Chrome Hard Back Case Cover For Apple iPhone 4S 4 4G Orang | |
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$0.89 Time Remaining: 31m |
| Orange OEM Touch Screen Digitizer LCD Back Cover Housing Assembly For iphone 4S | |
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$9.95 Time Remaining: 31m |
| Luxury Chrome Leopard Hard Back Case Cover Skin for Apple iPhone 4S 4 4G Verizon | |
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$0.01 Time Remaining: 31m |
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$0.01 Time Remaining: 31m |
| Resin Peace Pigeon Sripng Letter Rose Gem Pearl Bling Back iPhone 4S Case Cover | |
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$14.99 Time Remaining: 31m |
| Nintendo Game Boy Design Hard Case Back Cover For SAMSUNG i9100 GALAXY S S2 Gift | |
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$0.01 Time Remaining: 31m |
| Resin White Peace Pigeon Rose Flower Gem Crystal Bling Back iPhone 4S Case Cover | |
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$14.99 (1 Bid) Time Remaining: 32m |
| Wht Hard Plastic Dot Texture Back Cover for iPhone 4 4G | |
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$7.40 Time Remaining: 32m |
| New Light Pink Metal brushed back Battery Cover Case Door for Phone 4S | |
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$10.99 Time Remaining: 32m Buy It Now for only: $10.99 Buy It Now |
| 21 PCS Back Hard Skin Case Cover For iPhone 3G 3GS I60 | |
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$0.01 Time Remaining: 32m |
| NEW Premium Black High Gloss hard back silicone case cover for iPhone 4 4G 4S | |
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$7.98 Time Remaining: 32m |
| New Gray Metal brushed back Battery Cover Case Door for Phone 4S | |
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$9.99 Time Remaining: 33m Buy It Now for only: $9.99 Buy It Now |
| IMD Flower Circle Print Protective Back Case Cover for iPhone 4 4S | |
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$4.35 Time Remaining: 33m |
| New Orange Magnetic Leather Smart Cover stand with Back Case for iPad 2 Apple | |
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| 1PC DELUXE Hard Back Cover Case Skin With CHROME FOR Apple iPhone 4 4G Black New | |
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$0.01 (1 Bid) Time Remaining: 33m |
| New Super Fashion 3 PCS Hard Back Skin Case Cover for Apple Iphone 3G 3GS A07 | |
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$0.01 (1 Bid) Time Remaining: 33m |
| Deluxe Back Case Stand Cover With Chrome for Samsung Galaxy S II S2 i9100 White | |
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$0.01 Time Remaining: 33m |
| Luxury Transformers Aluminum plating Hard Back Case Cover Apple iPhone 4 4G 4S | |
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$0.01 Time Remaining: 33m |
| White Nintendo Game Boy Style Back Hard Case Cover For Apple iPhone 3G 3GS Gift | |
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$0.01 Time Remaining: 33m |
| 5PCS Colorful Silicone Soft Back Case Cover Skin For HTC Wildfire S G13 New Gift | |
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$0.89 Time Remaining: 33m |
| Luxury Transformers Chrome Hard Back Case Cover Skin For Apple iphone 4S 4 4G BU | |
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$0.01 Time Remaining: 33m |
| Bird Plum Blossom Painting Beige IMD Hard Back Cover for iPhone 4 4G 4S | |
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$5.12 Time Remaining: 33m |
| Sunflowers Butterfly Print Fuchsia Back Cover Case for iPhone 4 4G 4GS 4S | |
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$4.71 Time Remaining: 33m |
| 4pc New Candy Hard Polish Back Case Skin Cover Accessory For i Phone 4G 4S | |
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$0.99 (1 Bid) Time Remaining: 33m |
| New Baby Pink Orchid Hard Back Cover Case for iPhone 4 4G+Screen protector A92 | |
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$7.99 Time Remaining: 34m Buy It Now for only: $7.99 Buy It Now |
| Plastic Back Case Cover Holder for Nokia 5800 Phone | |
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$4.73 Time Remaining: 34m |
| New Orange Metal brushed back Battery Cover Case Door for Phone 4S | |
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| 5 TPU Gel Crystal Back Cover Case For iPhone 4G Plastic | |
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| Battery Back Cover Case For Samsung S8000 Jet | |
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$0.99 Time Remaining: 34m |
| New Pink Metal brushed back Battery Cover Case Door for Phone 4S | |
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| Full Body Lovely Rabbit Front Back Hard Cover Case Skin for Apple iPhone 4 4G 4S | |
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$0.01 Time Remaining: 35m |
| 2PC new Back Cover Case Housing for Iphone 4 4GBP 2 | |
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$0.99 Time Remaining: 35m |
| Smurfs Smurfed Movie Cartoon Hard Back Case Cover Skin For Apple iphone 4S 4G G | |
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$0.01 Time Remaining: 35m |
| 1PC DELUXE Hard Back Cover Case Skin With CHROME FOR Apple iPhone 4 4G Purple | |
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$0.01 Time Remaining: 35m |
| 1pc Polka Dots Hard Back Case Cover Skin For Apple iPod Touch 4 4G 4th Gen New | |
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$0.01 Time Remaining: 35m |
| Fashion Beautiful Hard Front + Back Cover Case Skin for Apple iPhone 4 4G 4S | |
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$0.01 Time Remaining: 35m |
| Lovely BABY PINK Cute Cat Eat SOFT Silicone Skin Back Cover Case iPhone4G 4S | |
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| TPU GEL Silicone Soft Back Case Cover Skin For Apple iphone 4 4G 4S ATT Verizon | |
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$0.01 Time Remaining: 35m |
| 1PC Gameboy Soft Silicone Back Case Cover Skin For Apple iPhone 4S 4 4G ATT New | |
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$0.01 Time Remaining: 35m |
| Pink White Polka Dots 3in1 Hard Back Cover Skin Case for iPhone 4 G 4G 4GS 4S | |
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$0.10 Time Remaining: 35m |
| Luxury Steel Aluminum Chrome Hard Back Case Cover For Apple iPhone 4S 4 4G Gold | |
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$0.01 Time Remaining: 35m |
| 1PCS Retro Nintendo Game Boy Hard Case Back Cover Apple iPhone 4 4G Fashion Gift | |
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$0.01 Time Remaining: 35m |
| New Black Magnetic Leather Smart Cover stand with Back Case for iPad 2 Apple | |
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| 97 03 Ford F150 Stainless Door 2 Handle Covers Set 2K H | |
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| New Deluxe Leather Chrome Back Case Cover Skin for Apple iPhone 4 4G ATT White | |
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$0.01 Time Remaining: 35m |
| Deluxe Black Hard Case Cover W Chrome F iPhone 4 4S frontback Screen Protector | |
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$0.01 (1 Bid) Time Remaining: 36m |
| New Purple Metal brushed back Battery Cover Case Door for Phone 4S | |
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$10.99 Time Remaining: 36m Buy It Now for only: $10.99 Buy It Now |
| New Rose Metal brushed back Battery Cover Case Door for Phone 4S | |
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| Hard Clear Plastic Snap On Shell Back Case Cover For Amazon Kindle 4 4th 6in | |
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| Noble Zebra Wave Bling Crystal Hard Case Back Cover Shell For iPad 2 iPad2 | |
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$10.99 Time Remaining: 36m |
| Pink Luxury Bling Crystal Sparkle Hard Back Case Cover Shell For iPad 2 iPad2 | |
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$10.99 Time Remaining: 36m |
| Blue Non slip Back Case Cover for Apple iPhone 3G | |
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$5.18 Time Remaining: 36m |
| Cute Duck with Christmas Hat Hard Back Case Cover+LCD Film For iPhone 4 4G 4S | |
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$8.59 Time Remaining: 37m |
| Black Cute 3D Pig W Crown Silicone Case Back Cover Skin For Apple iPhone 4 4G 4S | |
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$5.99 Time Remaining: 37m |
| Hearts Pattern Hard Plastic Colorful Back Case Cover for iPhone 4 4G 4S | |
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$4.75 Time Remaining: 37m |
| Cartoon Blue Umbrella Hard Back Case Cover+Screen Protector For iPhone 4 4G 4S | |
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$8.59 Time Remaining: 37m |
| Brown Cute 3D Pig W Crown Silicone Case Back Cover Skin For Apple iPhone 4 4G 4S | |
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$5.99 Time Remaining: 37m |
| New Silver Metal brushed back Battery Cover Case Door for Phone 4S | |
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$10.99 Time Remaining: 37m Buy It Now for only: $10.99 Buy It Now |
| Purple Cute 3D Pig Crown Silicone Case Back Cover Skin For Apple iPhone 4 4G 4S | |
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$5.99 Time Remaining: 37m |
| Dark Red Rubberized Hard Back Cover for Apple iPhone 4 | |
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$4.51 Time Remaining: 37m |
| Popular Eiffel Tower Hard Back Case Cover Skin+LCD Film For Apple iPhone 4 4G 4S | |
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$6.99 Time Remaining: 37m |
| 10Pcs Lot Hard Back Hard Case Cover Color For iPhone 4 4G | |
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| Paris Eiffel Tower Back Hard Case Cover For Apple iPhone 4 4G New Fashionable | |
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$0.01 Time Remaining: 37m |
| Popular Rock guitarist Hard Back Case Cover+LCD Film For Apple iPhone 4 4G 4S | |
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$6.99 Time Remaining: 37m |
| Black PU Plating Hard Chrome Back Case Cover+LCD Film For Apple iPhone 4 4G 4S | |
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$8.99 Time Remaining: 37m |
| Blue PU Plating Hard Chrome Back Case Cover+LCD Film For Apple iPhone 4 4G 4S | |
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$8.99 Time Remaining: 37m |
| Genuine Natural Bamboo Wood Hard Back Cover Case Skin for Apple iphone 4S 4 4G A | |
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$0.99 Time Remaining: 37m |
| 1PC Cute 3D Pig Crown Silicone Case Back Cover Skin for Apple iPhone 4G 4S BROW | |
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$0.01 Time Remaining: 37m |
| Luxury Bling Diamond Crystal Hard Back Case Cover For Apple iPhone 4 4S 4G Purpl | |
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$0.99 Time Remaining: 37m |
| Genuine Natural Bamboo Wood Hard Back Cover Case Skin for Apple iphone 4S 4 4G B | |
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$0.99 Time Remaining: 37m |
| Brown PU Plating Hard Chrome Back Case Cover+LCD Film For Apple iPhone 4 4G 4S | |
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$8.99 Time Remaining: 37m |
| Nintendo Gameboy Controller Hard Back Case Cover Skin For Apple iphone 4 4G 4S | |
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$0.01 Time Remaining: 37m |
| Deluxe Back Case Stand Cover With Chrome for Samsung Galaxy S II S2 i9100 purple | |
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$0.01 Time Remaining: 37m |
| Pink Bling Glitter Back Case Skin Cover for iPhone 4 4G | |
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$1.00 Time Remaining: 37m Buy It Now for only: $1.00 Buy It Now |
| 1PC Cute 3D Pig Crown Silicone Case Back Cover Skin for Apple iPhone 4G 4S RED | |
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$0.01 Time Remaining: 37m |
| Popular Classic Car Hard Back Case Cover Skin+LCD Film For Apple iPhone 4 4G 4S | |
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$6.99 Time Remaining: 37m |
| Green TPU Gel Clear Back Cover Case F iPhone 4G Plastic | |
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$1.29 Time Remaining: 37m Buy It Now for only: $1.29 Buy It Now |
| Expedition F150 Chrome Door Handle Cover Real Metal 2KH | |
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$51.50 Time Remaining: 37m Buy It Now for only: $51.50 Buy It Now |
| Luxury Bling Leather Hard Back Skin Case Cover For Apple iphone 4 4G 4S Gold | |
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$0.01 Time Remaining: 37m |
| Purple PU Plating Hard Chrome Back Case Cover+LCD Film For Apple iPhone 4 4G 4S | |
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$8.99 Time Remaining: 37m |
| Donald Duck 86hero Ero Hard Case Back Cover+Free LCD Film For iPhone 4 4G 4S | |
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$7.59 Time Remaining: 37m |
| 97 03 Ford F150 Stainless Door 2 Handle Covers Set 1K H | |
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$29.50 Time Remaining: 37m Buy It Now for only: $29.50 Buy It Now |
| Wholesale 10 x Silicone Back Case Cover Skin For iTouch iPod Touch 4G 4 Gen 4th | |
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$0.99 Time Remaining: 37m |
| 3D Stitch Movable Ear Flip Hard Back Case Cover Skin for Apple iPhone 4S 4G Blue | |
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$0.01 Time Remaining: 38m |
| Beige Deluxe Plating Chrome Hard PU leather Back Cover Case For iPhone 4 4G 4S | |
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$9.99 Time Remaining: 38m |
| GSM iPhone 4 4G Compatible Replacement Glass Rear Back Cover Housing Case Black | |
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$8.89 Time Remaining: 38m Buy It Now for only: $8.89 Buy It Now |
| New Yellow Metal brushed back Battery Cover Case Door for Phone 4S | |
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$10.99 Time Remaining: 38m Buy It Now for only: $10.99 Buy It Now |
Why do all electronic meters have a metal foil pasted inside on the back cover?
If you open any small digital multimeter or any small equipment which has a plastic cover, it has a small aluminum foil pasted on inside of the back cover and when you put the cover in place the foil touches a spring soldered on the PCB ( printed circuit board ) of the meter. Thus the foil is connected to the ground line of the PCB through a foil. What is the function of this arrangement?
It is an electrostatic screen. It prevents electrical noise interfering with the electronics in the multimeter and it prevents noise from the digital circuits in the meter leaking out into the environment.
You probably would not find this in an older meter. Electrical screening in modern equipment is better because of stricter regulations on electromagnetic compatibility and higher clock frequencies in digital equipment.
Spa Covers Going Green?
All this talk about going green, a big part of saving the environment is to not create more waste that will just end up clogging our land fills. Follow me on this for a minute... There are 10 million spa owners in the USA, and each one of them uses a typical rigid foam spa cover on their hot tub. For the sake of this demonstration each foam cover is only two inches thick and every spa is eight feet by eight feet. That would mean each spa cover contained about 10.666 cubic feet of foam per spa cover. For the rest of this example we will use 10.5 cubic feet per cover.
If each cover on every spa becomes saturated within two years and needs to be replaced that would mean that we would be adding 52.5 million cubic feet of waste to our landfills in just spa covers every year.
If it takes two and a half covers worth of foam to make up one cubic yard that translates to 4 million cubic yards of waste added to our land fills every two years just in spa covers.
If there are 11 million Cubic yards of stone in the Great Pyramid at Giza, we are adding enough foam to build a duplicate of it to our landfills just from used spa covers every six years conservatively. There are four and a half million cubic yards of concrete in Hoover Dam. We could build a two lane highway of discarded foam filled spa covers from Seattle Washington to Miami Florida every two years.
In case you have not noticed most foam filled spa covers are not two inches thick anymore. If all those old foam covers were four inches thick all these calculations would be double.
But we are just being conservative so we want to stick with two inches thick. If we ripped the covers in half and laid those pieces end to end we could circle the earth at the equator on used spa covers every two years.
Heck with parking lots, in a few years we could pave the entire planet with foam just from saturated foam spa covers from the USA alone.
So what is the solution? Well shop for a better spa cover. There are options available on the internet that your local spa dealer probably does not offer. You do not have to quit using your spa to save us. You just need to get a Spa Cover that does not use foam to insulate. There would be two major advantages to doing so. First the spa cover that did not use rigid foam to insulate would last longer. Since what always fails in the typical spa cover is the foam, either breaking or getting so saturated that you cannot lift it, a spa cover that did not use foam would tend to last longer.
Second, if the new type of spa cover does not use rigid foam it will also be a lot more friendly to the environment when it does come time to discard it. Less trash, less waste, less land fill, not that is what going green is all about.
About the Author
The Author is a business owner with more than twenty years experience. A former Police Sgt, Pilot, Heavy Equipment Operator, Trained Mechanic that has written technical manuals and short stories. An accomplished motorcycle rider he enjoys riding the back roads of Washington on his Harley Davidson, with his wife riding copilot. Please visit SpaCap.com
Spa Covers.
Ahmir - Come Back Cover by (Pierre Hopkins)
