DIY Nikon Mh-24 Charger Hack.

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DIY Nikon Mh-24 Charger Hack.

Postby vakubhai » Tue Mar 15, 2016 4:20 am

Hello Guys,

As a weekend project would like to hack my mh-24 charger.
The charger works on AC 100-240V to charge the EN-EL14 battery.

I would like to mod the charger & use it as a cradle to charge from a USB Power bank or car charger or any other 9V or 12V DC source.
The supply source above would be DC 5v to 12v.

I am plaanning to use a usb boost converter like this one.
http://www.ebay.in/itm/XL6009-DC-DC-Adjustable-Step-UP-Boost-Power-Converter-Module-Better-than-LM2577-/262191015386?hash=item3d0bcd65da:g:secAAOSwAKxWbp0t

The output voltage regulated at 8.4v to charge the battery.

My question.
Can i connect the output directly to the positive and negative connectors of the charger/battery.
Does the battery has inbuilt protection to cutoff charging when full.
If the charger protects the battery from overcharging. how do i prevent the battery from overcharge, using the inbuilt charger circuitry.

I would like to build something like this
http://www.amazon.com/Nikon-Replacement-Charger-EN-EL14-Battery/dp/B00KN18RII
OR
http://www.amazon.com/Replacement-miniCHARGER-Battery-Charger-EN-EL14/dp/B005LRX0A4
OR
http://www.amazon.co.uk/USB-Charger-Nikon-EN-EL14-P7700-P7800/dp/B00K0MAJ40/ref=sr_1_4?s=electronics&ie=UTF8&qid=1458042378&sr=1-4&keywords=usb+en-el14

Thanks in advance for the help.
vakubhai
 
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Re: DIY Nikon Mh-24 Charger Hack.

Postby leegong » Wed Mar 16, 2016 4:19 am

vakubhai wrote:Does the battery has inbuilt protection to cutoff charging when full.
If the charger protects the battery from overcharging. how do i prevent the battery from overcharge, using the inbuilt charger circuitry.


I don't know whether the battery has inbuilt over charging protection or not , however ,
i think that in theory it's ok to built overcharging protection in either battery or charger ,
if battery has built-in overcharging protection already , no need to built it in charger .
I recommend you take a look at PCB inside the battery , check if there is overcharging protection and
over discharging protection curcuit on the PCB .
leegong
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Re: DIY Nikon Mh-24 Charger Hack.

Postby vakubhai » Wed Mar 16, 2016 10:18 pm

Thankyou LEEGONG Sir for your reply.

I thought many of the friends here had broken apart a NIKON battery and would know what i intend to do.

BUT can i charge the battery directly if i connect the + and - terminals from another power source ??
vakubhai
 
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Re: DIY Nikon Mh-24 Charger Hack.

Postby leegong » Thu Mar 17, 2016 5:25 pm

vakubhai wrote:BUT can i charge the battery directly if i connect the + and - terminals from another power source ??

Hard to say yes or no , It depends on whether there is overcharging protection curcuit or not inside battery or inside the charger .
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