![]() ![]() ![]() It will also warn you if a battery's voltage is too high and poses a danger to your gear. A smart charger also reports the max capacity of a battery following one of these cycles, which lets you know which batteries are weaker or stronger and to pair up batteries with similar capacities. If a battery hasn't been used for months, running it through a charge/discharge/charge cycle can make it stronger. A smart charger handles each battery individually and maximizes its capacity and life. The bundled cheapies just charge, and often they charge in pairs, which means that the stronger battery in a pair gets only as much charge as the weaker one. If you use a lot of rechargeables frequently, a smart charger with programs for conditioning and reviving batteries is worthwhile. ![]() They have changed over the years (older ones are strictly AC powered). I've been grabbing at least one of these packages when they are on sale at Costco and now I have at least 10 of the free chargers laying around. For example, yesterday, I just picked up a set of 6 AA, 4 AAA, USB charger, sleeves to convert the AA into C and D sizes (have never used them), and case, all for $22 at Costco (on sale). The money may be better spent buying a new set with the included charger and just not letting them run down this time. A couple people are suggesting this, but I have to wonder how worthwhile it is for someone who uses their rechargeable batteries so infrequently to buy a $70 charger that can charge 4 batteries at a time. ![]()
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