About this replacement
NiKon D100 SLR Series — 7.4V Li-ion Replacement Battery (EN-EL3e)
This is a 7.4V, 2000mAh Li-ion cell built to the EN-EL3e specification. It fits the NiKon D100 SLR, DSLR D700, D50, and nine additional NiKon bodies that share the same battery bay and voltage rail. Swap it in when the original cell no longer holds enough charge to complete a shoot.
- D100 SLR family compatibility: These bodies share the EN-EL3e bay, a 7.4V nominal rail, and the same four-contact BMS handshake. The connector pinout and physical housing are identical across the D100, D700, and D50, so one cell fits all without modification.
- Bench tested on actual hardware: We cycled this cell through the D100 body and verified the BMS accepted the handshake on first insertion, reported charge state correctly, and held the 7.4V rail stable through a sustained burst-shooting sequence without triggering a low-voltage cutoff.
- First-cycle initialisation on the D100: Run the first full charge through the camera body or OEM charger rather than a third-party unit. Some NiKon bodies need one full in-camera charge cycle before the battery-remaining display maps accurately to this cell's discharge curve.
Battery percentage reading jumping on the D100 display after fitting a new EN-EL3e
The D100 maps battery percentage to fixed voltage thresholds calibrated against the original cell's discharge curve. A fresh replacement cell discharges at a slightly different curve until it has completed one full cycle. The camera reads a voltage point, looks it up against the stored threshold table, and reports a percentage that can skip steps or drop suddenly. Run one full charge-to-flat cycle and the indicator settles.
Shot count lower than expected when using the built-in flash heavily
The D100's built-in flash pulls a significant capacitor-recharge current spike after every fired frame — that draw sits on top of the sensor, mirror motor, and autofocus load. Spec shot counts are calculated without continuous flash. A session with flash firing every frame can cut effective shot count substantially compared to ambient-light shooting. If the cell depletes faster than expected, check whether flash is firing on every frame; switching to a hotshoe unit with its own power source removes that load from the EN-EL3e entirely.