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The cell voltage measurements are accurate up to +/-5 mV (under 0.2%) when in ideal voltage and temperature ranges of 2.8 V to 3.8 V and 0°C to 50°C. All 8 cells can be sampled in under 1 ms, although the typical scan rate is set to 32 ms. Current monitors checking for serious fault conditions use analog monitors for continuous monitoring. The ISL94202 automatically balances cells when a cell is greater than the threshold set by CBMINDV and there are no faults detected. The device can be set to balance while charging, discharging, or both. It can also be set to never balance. It is not recommended to balance while discharging, as this consumes power that could be used on the load. One other balancing condition is also available, which is the end of charge balancing. This is the only mode in which the device does not take current flow into account when checking whether to balance.
