Looking for a box with USB output that can run on 4x 18650s

[hank]

Review: USB battery box 4x18650 Coolook PB-2000

USB battery box 4x18650 Coolook PB-2000 [image] This battery box is called Coolook iPower and has the type number PB-2000, it can be found on ebay from a couple of dealers (They do not always include the brand name or type number). The specifications is something like: Battery replaceable. Intelligent charging with indicator to show the charging status. Output current-limiting protection to avoid damage when over load. Can charge most cell phones as well as iPhone and other Apple produc…

Review: USB battery box 4x18650 Coolook PB-2000 |

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