D800 and MB-MD12 batteries
I have noticed that the old EN-EL4a battery (for D3, D300 etc) seems to almost fit the new BL-5 battery cover for the EN-EL18 battery. It appears that if the small plastic lug on the top side of the EN-EL4a battery was removed it could be used with the BL-5 cover.
There is a difference in voltage output, namely:
EN-EL18 battery is rated at 10.8 volts 2000 mAh
EN-EL4a battery is rated at 11.1 volts 2500 mAh
Is the output difference between the two batteries (0.3 volts higher in the EN-EL4a) likely to do damage to the D800 or the MB-D12?
The price to set up a D800 with two EN-EL18 batteries (~$320) and an MH-26 charger (~$320) totals about $640 (B&H prices) and is quite ridiculous.
It would be nice if I could continue to use the EN-EL4a for both my D3 and the D800. One charger, one kind of battery and no exorbitant price.
Has anyone tried to use the EN-EL4a with the MB-D12/D800?
#1. "RE: D800 and MB-MD12 batteries" | In response to Reply # 0km6xz Nikonian since 22nd Jan 2009Tue 31-Jul-12 05:01 AM
The internal operating voltages are lower than 10-11 volts so there is a PWM voltage converter and regulars for each of the several voltages needed. Using the slightly higher voltage would reduce current drain from the battery, just the opposite of what would be expected from ohm's law if the load was resistive.
I think it would be a good choice if you had the batteries already. Note that the extra terminal is used for both charge rate detection for the charger and for charge status for the display. So there might be a slight difference in rear LCD display for charge state than expected but it all relative anyway.
I am going to get a grip soon for mine, when I go back to California for a few weeks in August and will be interested in any increases in battery life that can be obtained.
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