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I take old laptop batteries apart and use the cells for USB power banks. You can buy cases off of eBay for a couple bucks that hold two cells and have USB conne
by castratikron 9y ago
I take old laptop batteries apart and use the cells for USB power banks. You can buy cases off of eBay for a couple bucks that hold two cells and have USB connectors and a charge controller built in. It's no Powerwall, but they're still very useful. I power my bike light with them.
- robbles 9y agoWould you mind posting a link to the specific case you use?
- castratikron 9y agohttp://www.ebay.com/itm/NEW-5600mAh-5V-USB-Power-Bank-Case-18650-Battery-Charger-DIY-Case-For-Cell-Phone/351972879495 http://www.ebay.com/itm/NEW-5600mAh-5V-USB-Power-Bank-Case-1...
- voltagex_ 9y agoDo the cells have the protection circuits on them?
- susi22 9y agoThis one is better: http://www.thrunite.com/thrunite-c2-3400-mah-compact-portable-charger/ http://www.thrunite.com/thrunite-c2-3400-mah-compact-portabl... I asked for old laptop batteries from my relatives/friends, so I have currently around 30 of them. I also use it a lot for my bike light and hiking light. I bought the latest version of the C2 and it charges perfectly.