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USB coin cell battery charger 6x LIR2032 6x ML2032

12 channel battery charger 6x LIR2032 and 6x ML2032

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This is fusion of my 2 battery chargers.

I am spending lot of time with development coin battery powered devices.

I have full desk of batteries, I try solve this mess with 3D printed battery holder. It is good for organisation but after time I see that it is just only dust collector. If I need charged this chaos I used some USB hubs, then I have desk full with cables and chargers.

Here is solution for 2 battery chemistry.

- 6 independent charging channels for LIR2032 battery with 6 charging controllers
- charging feedback with 12 LEDS
- 6 independent charging channels for ML2032 (LMR2016) battery with trickle charging regulator
- ML part have no full charge feedback, just leave battery about 24 hours or more in charger
- powered with single micro USB connector
10x10 cm

-Both charging block are designed to keep specifications for LIR and ML charging

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Discussions

manta103g wrote 05/03/2018 at 13:20 point

Thank you.

I was not aware of any offered for sale, since contacting personally a number of China importers, every denied such rechargeable coin battery to ever exist.

https://www.ebay.com/sch/i.html?_nkw=rechargeable+button+cell

Now I aware of,  they were wrong, but it's an easy guess, why they don't import rechargeable coin batteries, since price is still prohibitive

Your project is great success, just look what is offered by your competitor and at what price:

from

http://store.eleksmaker.com/index.php?route=product/product&path=107&product_id=206

LIR2032 Charger

Product Code:LIR2032
Availability:10000
$25.00

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bobricius wrote 05/03/2018 at 13:31 point

hi, I seling my chargers with similar price :) https://www.tindie.com/stores/bobricius/ maybe eleksmaker charger is better but they battery holder is disaster.

I sold about 500pcs of my chargers and nobody report problem. You can found on ebay cheap coin cell chargers but they parameters are far away manufacturer spec.

Try search on ebay directly for LIR2032 an ML2032 batteries, they have different advantages, voltage and chemistry.

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manta103g wrote 05/03/2018 at 13:44 point

Thank you

from

https://en.wikipedia.org/wiki/Button_cell

got one more type of rechargeable coin

"

thus CR2032 is a disposable battery while ML2032, VL2032 and LIR2032 are rechargeables that fit in the same holder

"

I would love to get electrochemical system encoding in case of rechargeable coin batteries like one below:

"

Electrochemical system

The first letter in the IEC standard system identifies the chemical composition of the battery, which also implies a nominal voltage:

Letter

code
Common

name
Positive

electrode
Electrolyte
Negative

electrode
Nominal

voltage (V)
End-point

voltage (V)

L
Alkaline
Manganese dioxide
Alkali
Zinc
1.5
1.0

S
Silver
Silver oxide
Alkali
Zinc
1.55
1.2

P
Zinc-air
Oxygen
Alkali
Zinc
1.4
1.2

C
Lithium
Manganese dioxide
Organic
Lithium
3
2.0

B

Carbon monofluoride
Organic
Lithium
3
2.0

G

Copper oxide
Organic
Lithium
1.5
1.2

Z
Nickel oxyhydroxide
Manganese dioxide, nickel oxyhydroxide
Alkali
Zinc
1.5
?

M, N (withdrawn)
Mercury
Mercuric oxide
Alkali
Zinc
1.35/1.40
1.1

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manta103g wrote 05/03/2018 at 13:52 point

great stuff

but pricing is nightmare

https://www.tindie.com/products/bobricius/usb-coin-cell-battery-charger-6xlir20326xml2032/

I better switch to supercapacitors of the same size, one day

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manta103g wrote 05/03/2018 at 20:04 point

follow-up 4

Just removed coin battery from my K750 solar keyboard bty logitech www.logitech.com/k750.  Battery comes with yellow round sticker on top side, warning sign and caption: logitech.com/k750/support  DO NOT REPLACE BATTERY. I am just removing yellow round sticker to read what is pressed or printed under it.  MAXELL ML2032 3V  + Rechargeable  Japan.  Eureka. Great success. My first ML2032 3V for the collection and solar keyboard can serve as a charger. I need to get 10 more solar keyboards by logitech since I plan to stack 4 x ML2032 3V together in series to build 12V power bank.  Any idea ?

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manta103g wrote 05/03/2018 at 01:43 point

It took me a whole year to get a right answer, from you.

I have a lot of computer, electronic equipment, some coming with button cell backup or recharge in case of solar keyboard

but never got button cell with a "rechargeable" caption

thank you

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bobricius wrote 05/03/2018 at 05:32 point

year ???

There is lot rechargeable batteries on ebay

  Are you sure? yes | no

manta103g wrote 05/03/2018 at 13:23 point

exactly, but if you visit personally China importers and wholesalers and get negative response so you sometimes just give up ;)

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manta103g wrote 05/02/2018 at 21:31 point

Hi,

do you mean

Li-Ion button cells can be recharged ?

Ppl generally throw discharched  Li-Ion buttons into trash.

  Are you sure? yes | no

bobricius wrote 05/02/2018 at 21:45 point

CR2032 not, but ML2032 and LIR2032 are rechargeable

  Are you sure? yes | no

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