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Ricardo
Lv 7
A USB battery charger for a 4 volt battery.?
Hi,
I want to trickle charge a 4 volt battery operated emergency light from a USB port. What kind of electronic wizardry will I need to make sure it does not over charge the battery and blow it up, since it will be a continuous charge.
1 Answer
Relevance
- Anonymous5 years ago
What?
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