Battery issues H4D 40

[lumen]

I recently picked up a mint condition H4D 40 that came with two rechargeable battery grips. One worked fine (about 300 exposures) the other died quickly. Now the battery that held charge is only charging to 15% while the previous one seems to work.
WTF is going on?

Thanks!

[HLArt]

maybe it need to reset the batterygrip
 

So here's how to reset an H battery if it is not holding a charge or not lasting as long as it should.
First Charge the battery fully, preferably overnight.
Then grab an H body with no battery on it and press and hold the "menu" and "flash" buttons, and while holding them down push the battery up onto the handgrip. You should then here a rapid series of beeps indicating the PMU on the battery has been reset. Now put the battery back on charge and it should improve performance.
On a side note new batteries will have a low initial capacity, cycle them through charge discharge (on the camera) a few times to get full capacity.

hope it helps, cheers

[ette]

Thank you HLArt. I will try this after my next shoot. Sorry to hijack the thread

[mauro risch]

This reset process just saved me 4 batteries. They were all dying really quick and after the reset process,
they are back to 200 ~ 300 shots per charge.
It should be done periodically, I'd say every 3 to 6 mths.
Cheers,
Mauro

[lumen]

maybe it need to reset the batterygrip
 

So here's how to reset an H battery if it is not holding a charge or not lasting as long as it should.
First Charge the battery fully, preferably overnight.
Then grab an H body with no battery on it and press and hold the "menu" and "flash" buttons, and while holding them down push the battery up onto the handgrip. You should then here a rapid series of beeps indicating the PMU on the battery has been reset. Now put the battery back on charge and it should improve performance.
On a side note new batteries will have a low initial capacity, cycle them through charge discharge (on the camera) a few times to get full capacity.

hope it helps, cheers

Wow that really worked!
I had a fully charged battery that showed only 20% until I followed this procedure. Sure enough the batteries capacity shot up to 100%
Thanks!!!!