There is really no excuse for a battery mfg not matching a two cell pack very closely but some cheap ones might not be. Some people here think the issue of fires won't occur with lipos used in trains because they are used so gently. They believe it's only the RC guys that have problems because of high current draw and fast charging. To some extent, they are right. Those use regimens do increase the risk of imbalanced packs. But...Samsung had a problem with their phones that became big news and so have some people had problems with their vapor cigarette devices. Those people are using their batteries even more gently than a train.
It has little to do with use and everything to do with an overcharged cell. It can happen due to imbalance, especially over time. It's gradual but it can add up to disaster. Just for the heck of it, occasionally balance charge your multi cell lipos. It's better to be safe than sorry and it's not that hard nor are balancing chargers very expensive, these days.
I'm not really talking to you here, Bob but more others that may be reading this discussion.
Last edited on Tue May 9th, 2017 05:27 am by mwiz64
Mike, Agree with your comments. Overcharging is the usual reason for battery failure. Relying on a battery protection circuit (BPC) as often recommended and used in cell phones and most other portable devices can be risky. I use fully adjustable quality chargers and can observe the charge on screen. Most cell phones use a simple charger that never stops providing current. If the BPC fails......
That said a BPC is valuable to provide low voltage cutoff. Suggest any further general discussion of battery management and RC use be made in the Radio Control forum, unless it is specific to Geneseo Rwy.