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Linking drill batteries in series? Answered

i've been watching this video of a guy building a portable speaker powered with cordless drill batteries and i'd like to do the same for my project but my amp requires 30 to 36v. At around the 1 minute mark the video shows how he linked his battery up and i was wondering could 2 of those usb adapters be connected in series to allow 2 18v batteries to be linked together for 36v?

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ambientvoid

2 months ago

oh i intend to charge them with a standard charger, i was just concerned that running a combined 36v through 2 usb adapters that are presumably rated for 18v each might cause problems...

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Jack A Lopez

2 months ago

Sure. Why not?

Although, I suggest re-charging these batteries in the usual manner, with a charger that fits them.

I suppose if you have two chargers, or a charger with two, what is the word, "slots? ports? doors?connectors?", you know: the thing that has to fit the thing, you could recharge two (i.e. both) 18 volt batteries, at the same time.