LTC4091 ：电池充电到2V就不能再充

可能是认为电池失效

At the beginning of a charge cycle, if the battery voltage is low (below 2.9V) the charger goes into trickle charge reducingthechargecurrentto 10% ofthefull-scalecurrent. If the low battery voltage persists for one quarter of the total charge time, the battery is assumed to be defective, the charge cycle is terminated and the CHRG pin output assumes a high impedance state. If for any reason the battery voltage rises above ~2.9V the charge cycle will be restarted. To restart the charge cycle (i.e., when the dead battery is replaced with a discharged battery), simply remove the input voltage and reapply it or cycle the TIMER pin to 0V. Connecting the TIMER pin to ground disables the battery charger

可能是认为电池失效

At the beginning of a charge cycle, if the battery voltage is low (below 2.9V) the charger goes into trickle charge reducingthechargecurrentto 10% ofthefull-scalecurrent. If the low battery voltage persists for one quarter of the total charge time, the battery is assumed to be defective, the charge cycle is terminated and the CHRG pin output assumes a high impedance state. If for any reason the battery voltage rises above ~2.9V the charge cycle will be restarted. To restart the charge cycle (i.e., when the dead battery is replaced with a discharged battery), simply remove the input voltage and reapply it or cycle the TIMER pin to 0V. Connecting the TIMER pin to ground disables the battery charger