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Repurposing an 18 volt Ryobi lithium battery for a 12 volt device

Davidk

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Joined
Sep 23, 2021
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3
I’ve got a few 18 volt Ryobi lithium tool batteries. I wanted to run a 12 volt water jet from it to attach to my canoe. This seemed a simple project, but it has me beat. Rather than wasting the extra power as heat by putting some extra circuit in is there a simple way to step down the voltage from 18 to 12volts.
 
Have you checked the voltage references on your motors? Many 12vdc are happy with 18vdc.
 
Thanks Zil, there wasn’t much in specifications but when connected it would start and immediately stop as if there was a current overload issue
 
Thanks NVS, I’ll look at that. Could just let me know...what does BMS stand for? ?
 
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