vB Easy Archive - 51xx/61xx/71xx batteries

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51xx/61xx/71xx batteries
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Posted by: knightmarauder

Is there any information out there about how to disassemble these batteries without totally destroying it?

The only time I've seen inside the battery was when one was run over by a Ford truck: looks like a lot of retaining clips, but (thankfully) no glue.

Anyone got any better clue?

Posted by: RyanM

since i had about 2,000 oem batteries at one time, i felt like checking out what the insides looked like. its like a 8260 battery inside the case.

why do you want to take it apart?

Posted by: Dr. Dave

Most of them are glued shut, and like you said, are pretty much destroyed in the process of taking them apart. Maybe a hot razor knife?

Though lotsa clear, blinky batteries out there, they're pretty much the same, and don't have to be ripped apart.

Posted by: knightmarauder

i ask because i want to transplant a sculpted 7190 battery with a vibrating system. "Sculpted" being the bottom of the battery (unlike in the 51xx/61xx batteries) is tapered in. So it sort of looks semi-circular rather than tapered on one side only.

I bought one of those 8mm thick vibrating LiIon and wanted to exchange the vibrating motor (or at least the guts).

Any suggestions guys?

Posted by: Dr. Dave

Then the hot razor knife and a lot of patience could probably do it, though gluing it back together reliably may be a problem. The other possibility is to order a full clear casing from coolbattery.com for a 51xx or 61xx (you won't need the faceplate or the centre piece) as the kit includes a do-it-yourself clear battery casing that snaps together, and is sculpted like the 7190 batteries (or in fact the original Nokia BLS-2). Downfall is the clear casing will likely be more fragile and more likely to get scratched, and it *is* a clear casing. To the good, they're cheap, I think $5 US for the whole kit. It links from their 51xx/61xx/71xx page, in the LED section. (no linky cuz' their site uses frames and the link isn't easily determined at 2:45 AM!)

There may be issues with the little PCB in the battery though if you just transplant the vib motor. I think there's an added sense resistor in the pack somewhere to tell the phone that the vibrate motor is connected, to adjust the phone profiles accordingly. Probably best to transfer the entire guts of the new battery in.

I have a 5mm thick Li-Polymer battery for my 6161, and as cool as that is I find it's too thin and flat, and doesn't fit in my hand as well. Heck, just goes to show you that some things are better with curves!!!

Posted by: knightmarauder

Yeah, that's what I was thinking of doing, transfering the entire set of guts from one battery to another.

According to schematics (kudos, you know who you are) the phone sends a pulse along battery terminal 3 (i think that's what it was) that signals the vibrator to engage.

After transfering the guts - something which should work without a hitch - I was considering changing the vibrate motor to that of the 33xx series. Those were some of the most powerful vibrates I have ever felt in a phone. Either that, or buy an entirely new motor from the local junk shop downtown.

(man, 5mm thick?? that's crazy, after the shell moulding is taken into account, that's like 3mm for the actual battery! Mine is 8mm and I'm perpetually amazed that a vibrate can fit inside)

Posted by: Dr. Dave

Less than 5mm... 950 mAh LiPolymer, and a vibrate too...

(though the vib isn't earthshaking)

Set of mic's says 6.5 mm thick, full thickness. 3mm from the edge of the phone housing to the back. Damned if I know how they do it, but it's pretty amazing...

You can never go by published figures tho for thickness... they're pretty abstract marketingwise. I go from the case edge to the back to the battery case back. This was 3mm, a Nokia BLS-2N is about 6mm, and a BMS-2N is about 10 (as mic'ed 30 seconds ago)

Posted by: Dr. Dave

Also, the strength of the vib has to do with the thickness of the motor assembly (and thus the mass offset of the weight). The 3390's are good because the motor is in the phone body, and has a lot of space to swing around that mass. Less space in a vib battery for the nokias, so they'll always be less impressive.

My really thin battery - I'm scratching my head too... Kinda cool not to know, though.