I've recently upgraded to the MH-C9000 for proper charging methods. I began reading the manual regarding the different modes, noticing the implied importance of the BREAK-IN mode, for fresh or old batteries. I recognized it follows a rather basic, unwavering formula, charging any given cell at 10% its capacity per hour for 16 hours (overloading during the final 6), discharging, then charging again. It states overloading cells is "safe" because of the low(er) charge rate, which may contain some truth. Common sense seemed like overloading is generally a bad idea.
Unsurprisingly, the first 4 AA cells (Duracell 2450 mAh) I used BREAK-IN for were popping & venting dozens of time after their rated capacities began to become overloaded. It is my understanding that at no point should a cell have to vent under safe operating conditions, or am I mistaken? Venting also degrades the cell & lowers the capacity as properties escape the cell, no? The ambient room temperature was around 50-60 F, with a fan circulating air directly over; this was not a heat issue. I tried a different model of AA cell, an Energizer, same deal, maybe not as much venting. AAA cells did not readily appear to vent with their lower charging rates, though I couldn't be certain. Before every BREAK-IN, I made sure the cells were fully discharged, as well.
The manual recommends BREAK-IN for fresh cells and once every 30 cycles. I don't trust this based on my experiences. Input? Maybe I just don't understand it, but overloading seems to be doing a lot more harm than good. With a large order of new Imedion cells coming in, I am cautious to use BREAK-IN on them. Rather set a custom & safer CYCLE or REFRESH mode instead for similar effect? Or compensate for the formulaic overloading by inputting a lower capacity?
Unsurprisingly, the first 4 AA cells (Duracell 2450 mAh) I used BREAK-IN for were popping & venting dozens of time after their rated capacities began to become overloaded. It is my understanding that at no point should a cell have to vent under safe operating conditions, or am I mistaken? Venting also degrades the cell & lowers the capacity as properties escape the cell, no? The ambient room temperature was around 50-60 F, with a fan circulating air directly over; this was not a heat issue. I tried a different model of AA cell, an Energizer, same deal, maybe not as much venting. AAA cells did not readily appear to vent with their lower charging rates, though I couldn't be certain. Before every BREAK-IN, I made sure the cells were fully discharged, as well.
The manual recommends BREAK-IN for fresh cells and once every 30 cycles. I don't trust this based on my experiences. Input? Maybe I just don't understand it, but overloading seems to be doing a lot more harm than good. With a large order of new Imedion cells coming in, I am cautious to use BREAK-IN on them. Rather set a custom & safer CYCLE or REFRESH mode instead for similar effect? Or compensate for the formulaic overloading by inputting a lower capacity?