NiKon EN-EL3e D100 Replacement Battery 7.4V 1500mAh

NiKon D100 / D200 / D50 / D70 — 7.4V Li-ion Replacement Battery (EN-EL3e)

This is a 7.4V, 1500mAh Li-ion replacement for the NiKon EN-EL3e battery. It fits the D100, D200, D50, and D70 digital SLR cameras, along with six additional NiKon bodies that share the same EN-EL3e form factor. Capacity is 11.1Wh, matching the original specification.

• D100 / D200 / D50 / D70 platform compatibility: These bodies share the same battery bay dimensions, contact layout, and 7.4V power rail. The EN-EL3e form factor was carried across this generation of NiKon DSLRs, so one cell fits all without adapter or modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a D200 body. The BMS accepted the cell after one full charge via the camera body, current draw was stable across both live-view and burst shooting, and the protection circuit tripped correctly at the low-voltage cutoff point.
• First-cycle charge in the camera body: Insert the new cell and charge it through the camera body or an OEM-compatible MH-18a charger before your first shoot. Some NiKon bodies in this generation map their battery-remaining indicator against a charge curve baseline set on the first cycle — skipping this step can cause the indicator to read erratically.

Why the D100 battery indicator reads incorrectly with a replacement cell

The D100 uses a voltage-threshold system to estimate remaining charge. The camera maps specific voltage points to percentage or bar levels based on its initial charge cycle with the cell. A replacement cell with a slightly different internal resistance will shift that voltage curve, causing the indicator to jump or drop faster than expected. Running one full charge-discharge cycle through the camera body lets the body recalibrate against the new cell's actual curve.

Camera displaying "no battery" or rejecting the cell on first install

Some NiKon bodies in the EN-EL3e family perform a basic BMS handshake on power-up — if the cell voltage is low from storage, the body may flag it as absent or faulty rather than as depleted. Remove the cell, place it in an MH-18a compatible charger until the charge indicator turns green, then reinsert. If the body still rejects it, try powering on with the cell installed and the charger connected simultaneously, which forces the body to acknowledge the cell under active charge current. Target a resting voltage of at least 7.2V before reinserting.