Battery Refresh - Canon 1dmkii - Help Rqd.

snoop69

snoop69

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Paul
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Hi all,

Last night around 22.00hrs I put my batteries on charge & pushed the refresh button.

This morning I was hoping to see two flashing red lights but one is solid yellow & the other is flashing yellow.

I have a shoot this afternoon & im worried that the batteries will not be charged in time.

Would it be safe to unplug the batteries & put them on charge again?

Not sure if these batteries suffer from 'memory effect'.

Any ideas guys?
 
This might not be of any use, but if the batteries have Ni-CD written on them then they are nickel cadmium batteries and can be prone to 'memory effect'

If they are li-ion they are less prone.
 
Paul_Westhead said:
This might not be of any use, but if the batteries have Ni-CD written on them then they are nickel cadmium batteries and can be prone to 'memory effect'

If they are li-ion they are less prone.
Click to expand...

Thanks for your reply,

both batteries are 'Ni-Mh'
 
These are the charging modes.

Solid Red LED = Charging

Slow Red Blinking LED =Waiting to Charge

Fast Red Blinking LED = Fast Charge Completed Now on Trickle

Solid Yellow LED = Discharging (Conditioning)

Slow Yellow Blinking = Waiting to Discharge (Conditioning)

My temptation would be to take them off charge power cycle the charger leaving 5 mins for any residual power in the charger to dissipate then put them back on for a normal charge.

Then when you have more time put them through a proper cycle.
 
With ni-mh they tend not to suffer from memory affect but they do suffer from voltage depression where one cell won't take as much charge as its partners.

The best thing to do in this case is wear them down until the charger detects them as flat through a full cycle then let them recharge.

Normally I carry double the batteries I need and two chargers which means I can charge two batteries at once.
 
Paul_Westhead said:
My temptation would be to take them off charge power cycle the charger leaving 5 mins for any residual power in the charger to dissipate then put them back on for a normal charge.

Then when you have more time put them through a proper cycle.
Click to expand...

Thanks Paul, think I am going to have to go with that idea.

I will tell the batteries that there is going to be a power cut so they dont
get too upset later :lol:
 
Paul_Westhead said:
With ni-mh they tend not to suffer from memory affect but they do suffer from voltage depression where one cell won't take as much charge as its partners.

The best thing to do in this case is wear them down until the charger detects them as flat through a full cycle then let them recharge.

Normally I carry double the batteries I need and two chargers which means I can charge two batteries at once.
Click to expand...

Im going to un-plug, leave 10 mins & put them on a normal charge. If they
fail later, I will have to use the mains adapter as back-up.

I will put them on refresh again when home later :thumbs:
 
I can second the 7 day shop ones at £13 a piece they're great!!

The refresh on the charger is a very lengthy process as it very slowly discharges battery.

I've previously just used a PC case fan as a discharging device as it has a nice low draw.

I wear my 1D batteries out totally in the camera, and then run them on a refresh and recharge cycle, but appreciate its not always convenient to do this!!!
 
I wouldn't be concerned about the second battery as it's simply waiting for the first one to finish....although it's a twin charger, the cycles are sequential and not simultaneous.

Bob
 
I believe it can:

Discharge both at once
Charge one discharge one

I think its just not able to charge both at once
 
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