| Joined: | Sun Apr 1st, 2012 |
| Location: | Carthew, Cornwall, United Kingdom |
| Posts: | 6829 |
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Sorry to disagree JK but it isn't "over engineering". Batteries are consumable items so replacing, for example, the EN-EL3 with the EN-EL3a on the production line is simply a sensible upgrade that allows users of older cameras to keep using the new batteries but allows Nikon to add functionality to a new camera body. The same applies to later variants of the battery. In your case the EN-EL15b can be charged in the Z7 because it was designed that way. The new battery works just fine in the D800, good backward compatibility, keeping the D800 user supplied with new batteries as required.
I understand the new specs and the desire for progress so while I havent taken the individual batteries apart to identify the individual differences.
I am however pretty sure that the only difference is the control circuitry.
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