Battery charging
Hi Patrick,
A rechargeable battery will eventually fail to accept a charge - just like your car battery.
The number of recharges a battery will be able to accept is dependent on a number of things, such as: temperature, if it is run to almost nothing before recharging (or if it is recharged after only being discharged slightly), how much of a load is on the battery and how fast (high amperage) or slow (low amperage) the battery is recharged.
Generally, cooler temperatures are better for batteries, as is using the battery almost completely before recharging rather than topping off after minimal usage, small loads are better (you don't have a choice in your GPS watch tho) and a slow or "trickle" charge is better than a fast, high current charge (you may not have a choice on this either). A few hundred discharge / recharge cycles is not uncommon - significantly less if the battery isn't cycled properly or used in harsh conditions.
I hope this helps!
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