System monitors
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From our buying guide
BCI defines a battery management system as an electronic system that monitors a battery's condition, performance and health. Some lithium batteries have one built in and some need an external unit.
Check before you buy:
- A voltage reading means little until the battery has rested, and each maker sets its own rest and table.
- An amp-hour figure needs its rate, since BCI says rated capacity is specified at a particular discharge rate, temperature and cutoff voltage.