I think this varies from battery to battery.
The Sanyo eneloops can hold charge for up to 6 months, whereas other brands and types may not last as long.
ok, to be clearer - I'm referring to the normal formulations, rather than long lasting nimh battries such as eneloops and recykos...
Mine discharge completely after 3 days, and i'm wondering if this is normal.
eeks.
the cells are about 10 months old, and have been charged about 30 times.
Perhaps I shouldn't use this 15 minute charger I have. >.<
hi dnaxe, you are quite right actually. Fast charge also means shorter lifespan. I will not go into the technical explaination ... very boring.
We did design some batteries specially for remote control car racing purpose. They can be recharged in 5~10 minutes and the output instantanous power is very very high. However, they only can re-charge about 5 times, after that, the capacity drops to almost ZERO.
If recharge time is not very critical, I would recommend that you do a slow charge or overnight charging ( about say 10~ 15hours slow charge, using very small current ). We call this formatting the cells. Maximum lifespan + Maximum cell capacity is achieved.
Is it really true the rechareable batteries can recharge for 500 or even 1000 times that the advertisement says? I find this like too good to be true! Based on my usage of say 1 or even less than 1 charging per week, I could use the batteries for at least 10 years!! :bigeyes:
hi dnaxe, you are quite right actually. Fast charge also means shorter lifespan. I will not go into the technical explaination ... very boring.
We did design some batteries specially for remote control car racing purpose. They can be recharged in 5~10 minutes and the output instantanous power is very very high. However, they only can re-charge about 5 times, after that, the capacity drops to almost ZERO.
If recharge time is not very critical, I would recommend that you do a slow charge or overnight charging ( about say 10~ 15hours slow charge, using very small current ). We call this formatting the cells. Maximum lifespan + Maximum cell capacity is achieved.
ok, to be clearer - I'm referring to the normal formulations, rather than long lasting nimh battries such as eneloops and recykos...
Mine discharge completely after 3 days, and i'm wondering if this is normal.
so quick chargers are actually bad?
Is it really true the rechareable batteries can recharge for 500 or even 1000 times that the advertisement says? I find this like too good to be true! Based on my usage of say 1 or even less than 1 charging per week, I could use the batteries for at least 10 years!! :bigeyes:
so quick chargers are actually bad?
so quick chargers are actually bad?
Do you have the faulty Sanyo 2500mAhs?
Typical recharge cycle is between 300 ~ 500 cycles. However, it should be noted that this figures are based on slow charging and slow discharge rate. Meaning that if you discharge the cells too fast ( for example ... completely discharging the cells in 1/2 hour) or charge the cells too rapidly ( fast charge in say 1 hour ), the number of recharge cycles will drop accordingly.