Hi, I'm wondering how should I recharge my Fenix 5S to maximize battery lifetime? Wait until battery is almost drained or try to keep energy level between some values (for example 30 - 70%)?
Li-ion batteries typically experience a drop of about 20% in capacity over 500 cycles (a cycle being a 0%-100% recharge). With people getting 5-7 days battery life out of a 5S even with GPS use for an hour per day, the watch will be obsolete long before it reaches anywhere near 500 cycles and battery life becomes an issue (compared with a smart phone which typically has a daily charge cycle).
That said, keeping it between 30% and 70% does maximize battery life. But don't be afraid to charge it to 100% before a big event - who wants to deal with even the possibility of running out of battery on a big event.
