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Old 04-05-2018 | 03:40 AM
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CaptainB
 
Joined: Aug 2010
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From: FleetUK, UNITED KINGDOM
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It sounds like your battery is a Lithium Polymer and not Lithium Ion. Lithium Polymer batteries have a nominal voltage of 3.7v per cell which is why yours says 2s 7.4v on the label.
I use LIPOS a lot and only ever charge them on a LIPO charger making sure that the balance connector is plugged in. LIPOS are extremely dangerous if not charged properly so beware.

Good luck

CaptB