maemo.org - Talk - Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1)

i think that capacity is correct because when my nokia was with 1 that 18500 and standart battery not original 1320mah but about 1000 mah
the sum capacity ~ 6000mah
charge time with 1A charger was about 5h 30 min - 6h
i will test them when i can .

Well when you charge them the charge current goes down at the end as voltage potential gets smaller, best way if you don't have anything else is to make a discharge test, make a constant current discharge of 1A, when voltage gets lower then 3.2V (to be safe) note the time, if you hit 1A spot on then you have 3000mAh if it takes 3 hours for the voltage to go from 4.2V to 3-3.2V.

bogdanov_s

2013-03-28 07:32

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout

Quote:

Originally Posted by Estel (Post 1331347)

You can also test them on device, via calibrating bq27x00 chip. See my signature for howto.

But don't expect miracles, there is limit of how much capacity you can put inside cubic cm in Li-Ion ;) I'm perfectly sure that you have ~same capacity with this strange design, as we got with dual-scud/polarcell setup inside mugen cover.

/Estel

when type bq27200.sh -> line 205: ./i2cget: Permission denied
line 205: syntax error: * 3570 / 21 / 1000

pls tell me what to do

handaxe

2013-03-28 15:06

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout

Quote:

Originally Posted by bogdanov_s (Post 1332430)

when type bq27200.sh -> line 205: ./i2cget: Permission denied
line 205: syntax error: * 3570 / 21 / 1000

pls tell me what to do

A quick reply, without re-reading the relevant posting: are you running this as root?

bogdanov_s

2013-03-28 16:39

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout

Quote:

Originally Posted by handaxe (Post 1332549)

A quick reply, without re-reading the relevant posting: are you running this as root?

yep as root

handaxe

2013-03-28 17:13

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout

And you have the i2cget binary set as executable?

If not, "chmod +x i2cget" (if executed in same folder or set correct path to file)

Estel

2013-03-28 18:57

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout

Also, ensure that you don't have bq27x00_battery module loaded. You may unload it, by executing (as root):

Code:

modprobe -r bq27x00_battery

/Estel

gilesn

2013-04-09 09:32

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout

Hi Guys, The battery meter widget is showing long values since installing KP52 - was OK before. That offending battery module is not loaded as far as I can see. Any ideas?

Thanks
Giles.

pichlo

2013-04-09 11:01

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout

@gilesn,
Not sure what you mean by "long values" but... could it be related to this?

In any case, this has nothing to do with home made batteries.

gilesn

2013-04-09 12:27

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout

It's to do with dr_frost_dk's Battery Meter widget, see first post..

Long as in wrong! E.g. the % value is showing 3455090.6%.

pichlo

2013-04-09 14:51

Re: Battery Tests, Homemade 3000mAh XL Battery & Q&A (POST #1) - New Layout

FWIW, after last reboot the battery status in my status area said "no data or battery not calibrated". The same issue as reported in the post that I linked. Might your problem be a different face of the same thing? There it was blamed on KP52, here you blame it on the widget. But it looks like it's the status-area-applet-battery_1.0-5_armel.deb update that caused it.

In any case, mine fixed itself after a full discharge and recharge.

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