Rechargeable batteries
- Thread starter DRuM
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DRuM
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Lisa,
Wow, you really know your portable players and batteries! Yes, I'm looking at the old sony battery, and it is indeed a Ni-Cd 650mA. The battery is a BP-DM10, and the sony cd player is model D-E305 with 10 second ESP. It must be about 8 to 10 years old since I bought it, I think. So from what you're saying, if the old battery gave me 2.5 hours, then I might get 3 hours, and if the old battery gave me 3 to 4 hours, then I could get anything from 3.5 to 4.5 hours. Though I suspect it'll be closer to 3/3.5.
With 3 lots of batteries I'll be carrying, including the old battery, I'll have at least 7 hours of continuous playtime, and I'll probably rarely need that much play time anyway. So that's cool! Sorted.
Thanks for the tip about them losing charge. Well, if there's 80-90% left after a few days, that's not a problem. However, is it ok to charge batteries that still have power, or does that shorten the life?
My charger is also for Ni-MH batteries, but it doesn't cut off. I like the idea of auto cutoff on that charger you mentioned. Not too worried about that for now, maybe in the future.
Here's my charger:
http://www.ciao.co.uk/Uniross__Review_5393574
Wow, you really know your portable players and batteries! Yes, I'm looking at the old sony battery, and it is indeed a Ni-Cd 650mA. The battery is a BP-DM10, and the sony cd player is model D-E305 with 10 second ESP. It must be about 8 to 10 years old since I bought it, I think. So from what you're saying, if the old battery gave me 2.5 hours, then I might get 3 hours, and if the old battery gave me 3 to 4 hours, then I could get anything from 3.5 to 4.5 hours. Though I suspect it'll be closer to 3/3.5.
With 3 lots of batteries I'll be carrying, including the old battery, I'll have at least 7 hours of continuous playtime, and I'll probably rarely need that much play time anyway. So that's cool! Sorted.
Thanks for the tip about them losing charge. Well, if there's 80-90% left after a few days, that's not a problem. However, is it ok to charge batteries that still have power, or does that shorten the life?
My charger is also for Ni-MH batteries, but it doesn't cut off. I like the idea of auto cutoff on that charger you mentioned. Not too worried about that for now, maybe in the future.
Here's my charger:
http://www.ciao.co.uk/Uniross__Review_5393574
chillysalsa
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My brother had a similar problem with his Sony, a pair of 'regular' NiMH AA batteries would not charge.
I noticed something with the original Sony batteries: there was a 4 mm area where the metal of battery casing was exposed around the bottom / negative side of the cells.
The trick was that Sony put a little circuit that uses contacts on the shiny end to detect if you are using their Sony batteries with the exposed end - this prevents you from accidentally charging (and blowing up) alkelines in their walkmans.
I simply took the new generic NiMH batteries my brother bought, and used an exacto knife to cut away the wrapping on the ends to make them look exactly like the original Sony ones. Then they charged up and worked fine!
I noticed something with the original Sony batteries: there was a 4 mm area where the metal of battery casing was exposed around the bottom / negative side of the cells.
The trick was that Sony put a little circuit that uses contacts on the shiny end to detect if you are using their Sony batteries with the exposed end - this prevents you from accidentally charging (and blowing up) alkelines in their walkmans.
I simply took the new generic NiMH batteries my brother bought, and used an exacto knife to cut away the wrapping on the ends to make them look exactly like the original Sony ones. Then they charged up and worked fine!
chillysalsa
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double post, sorry:
chillysalsa
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Quote:
There is a different trick to getting these to charge in the player.
Simply remove the old batteries from that metal & plastic holder that has "NiCD" logo on it, the cells are just glued into there and can be unstuck:
And use this holder to charge your new batteries. Make sure the polarity is correct though! That's what I did with my old Sony discman, it had that system going on...
| Originally Posted by DRuM ... The battery is a BP-DM10, |
There is a different trick to getting these to charge in the player.
Simply remove the old batteries from that metal & plastic holder that has "NiCD" logo on it, the cells are just glued into there and can be unstuck:
And use this holder to charge your new batteries. Make sure the polarity is correct though! That's what I did with my old Sony discman, it had that system going on...
DRuM
500+ Head-Fier
Put my new rechargeable batteries into the holder I took from the old sony battery? Sounds good to me, thanks for the tip!
Lisa
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Quote:
Actually I was just guessing from what I remembered from my old sony. And the reason I got it all right is because mine is the D-E305
I was looking at the manual yesterday cause I wanted to know what it said about the batterylife.
It said that with continues play when not moving the payer you get 4 hrs with esp off and 3.5 with esp on with the 650 mah batterypack. So you'll get 3 hrs for sure out of those 800 mah.
Also the output is 2x15mw which is pretty good.
And the D-E305 is from '97 or '98.
I tried to get the sony batteries out of that holder because my player doesn't charge good anymore and i wanted to be able to charge them in another charger but I ended up totally ruining both the holder and the batteries. It's glued together pretty strong.
| Originally Posted by DRuM Lisa, Wow, you really know your portable players and batteries! Yes, I'm looking at the old sony battery, and it is indeed a Ni-Cd 650mA. The battery is a BP-DM10, and the sony cd player is model D-E305 with 10 second ESP. |
Actually I was just guessing from what I remembered from my old sony. And the reason I got it all right is because mine is the D-E305
I was looking at the manual yesterday cause I wanted to know what it said about the batterylife.
It said that with continues play when not moving the payer you get 4 hrs with esp off and 3.5 with esp on with the 650 mah batterypack. So you'll get 3 hrs for sure out of those 800 mah.
Also the output is 2x15mw which is pretty good.
And the D-E305 is from '97 or '98.
I tried to get the sony batteries out of that holder because my player doesn't charge good anymore and i wanted to be able to charge them in another charger but I ended up totally ruining both the holder and the batteries. It's glued together pretty strong.
chillysalsa
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Quote:
Oh no.. that's no good. Mine came apart pretty easy. All that the black plastic piece of the holder does, is press in this little micro-switch in the battery compartment. You could just duct tape that switch down or put something there to hold it down, and then put in regular NiCd's or NiMH's and they will charge.
| Originally Posted by Lisa ... I tried to get the sony batteries out of that holder because my player doesn't charge good anymore and i wanted to be able to charge them in another charger but I ended up totally ruining both the holder and the batteries. It's glued together pretty strong. |
Oh no.. that's no good. Mine came apart pretty easy. All that the black plastic piece of the holder does, is press in this little micro-switch in the battery compartment. You could just duct tape that switch down or put something there to hold it down, and then put in regular NiCd's or NiMH's and they will charge.
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