Bought for my mum's Panasonic cordless phone. The last ones I bought were generic and didn't last long so I decided to use more expensive brand name batteries from the same manufacturer. Either they're really bad, or she got a bad batch. According to the instructions, she has fully charged them beforehand. the first few times she used the phone to use them and recharge them, letting them drain completely and then recharging them for normal use. Well, they get exhausted quickly anyway. Thinking it might just be a problem with the headset, she used the other two batteries in another headset. Same charging/recharging process, same charging process, same results. The original batteries gave her about 4-5 hours of talk time and at least a couple of days of standby time without recharging. Without a charger, they run out of power for about 50 minutes of talk time and about 3 hours of standby time. And they seem to get weaker with each cycle, not much, despite sitting on the charger all night and starting the day on a full charge. For these results, I can honestly say that generic Revain is better than these, if not by much.
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