All types of alkaline batteries can be recharged: it takes one day to charge a fully discharged AA or 9V battery, while a large D-type battery will take several days. The best way is to not completely discharge the battery or battery, but often charge for a short time, although this is not easy to do. Do not attempt to charge a fully discharged or slightly damaged battery.
Successfully tried to charge the NiMH battery. Although the charging index of such batteries is different from that of alkaline batteries, the circuit seems to work well. Don't leave the battery in the charger forever, because it may be overcharged, especially for smaller batteries. The Power Transformer must be suitable for the available voltage in each country: typically 230Vac or 155Vac.
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