Defective '5,000,000mAh' power bank
It arrived dead, but in a highly dangerous state and could have burst into flames at any moment.
If you're in the business of repairing PCs, smartphones, or tablets, then you need the tools to help you get the job done in a fast, efficient, and safe way. Updated with reader suggestions July 2017.
These tiny USB lights -- which are little more than LEDs attached to a circuit board with a USB connector -- are awesome for both testing USB ports (I've lost count of the times that the reason a device isn't working is a broken USB port) and for illuminating the back of a PC when plugging in cables and connectors.
Caption by: Adrian Kingsley-Hughes
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