RealestateRichie

Hello!! I forgot to unplug my battery from my boat after months of storage. Battery charger wont charge it or even initiate a charge. I am using the Dynamite Prophet Sport Mini charger. This is for a Pro Boat Recoil 26 brushless motor. Any suggestions on getting this batter to charge or replacement batteries.
The oem battery was a 30C 3200mAh 3S 11.1V Lipo. Hard to find a similar batter with the same specs. Any help is greatly appreciated.

mfr02

Screen grab of a search. just a question of using the right terms. As long as the physical size needs are met, and the C-rating and / or capacity figures are the same or better, it will work.
The only caveats are if the particular boat has an odd connector or trick wiring.


Lipo batteries die irretrievably if allowed to over discharge, and they very rarely come back.

RealestateRichie

Are they 11.1 V though. Doesn't the volt make a difference in power/speed?

Thanks for the help and screen shot.

mfr02

It's in the nature of the physics of LiPo batteries that they are 3.7 volts per cell. 3 in series (3S) gives 11.1 volts. As with all batteries of whatever type, the voltage on the label is a nominal voltage, a fully charged one will be a bit more, a discharged one rather less. In the case of LiPo, as you have noticed, dropping the voltage too far is fatal for the battery.
In the world of older type batteries, as the voltage dropped, so did the performance and you could gauge when to end the session safely. LiPo gives almost full power until it doesn't, then everything stops suddenly.

Hydro Junkie

Something else that most forget about is that batteries have a lifespan of recharge cycles as well. While the number of cycles vary from pack to pack, you used to be able to tell a pack is getting "long in the tooth" by how much time it takes to run down, older packs tend to run down faster than new ones. With the new tech now available, this may not still be the case. Others might know more about that than me since I still run "old school" nicad receiver packs in my boats