Quick answer
Put the EN-EL15 battery into the Nikon MH-25A charger, plug the charger into a wall outlet, and let it charge until the indicator stops blinking. For D7000, D750 and D850 bodies, use one battery per charger slot, avoid charging in direct sun or on soft furniture, and unplug the charger once charging is complete.
Match the battery to the charger before you plug in
The MH-25A is made for Nikon EN-EL15 batteries, which are used by the D7000, D750 and D850. Check the label on your battery before charging: if it is not an EN-EL15 variant, stop and use the correct charger. Pre-owned cameras often arrive with third-party batteries, and those may not fit or charge correctly in the MH-25A.
Inspect the battery contacts and the charger pins for corrosion, dust or bent metal. A quick wipe with a dry, soft cloth is enough. Do not use water, alcohol or abrasive pads on the contacts.
Charge in a safe spot, not on your camera bag
Place the MH-25A on a hard, heat-resistant surface with space around it. Charging generates heat, and covering the charger with a jacket, towel or camera insert traps that heat. Keep it away from curtains, paper and direct sunlight.
Plug the charger directly into a wall outlet. Avoid daisy-chaining extension cords or plugging it into a laptop USB port, because the MH-25A needs a stable mains supply. If the outlet feels loose or the plug gets hot, stop and try another outlet.
Read the indicator light correctly
The MH-25A uses an indicator light to show charging status. A blinking light means charging is in progress; a steady light means the battery is charged. If the light blinks in an unusual pattern or does not come on at all, remove the battery and check the contacts again.
Do not pull the battery out while the light is blinking unless you need to stop for safety. Repeatedly interrupting a charge cycle adds unnecessary wear, especially on older pre-owned batteries.
Store and rotate pre-owned batteries
If you shoot with a D7000, D750 or D850, label each EN-EL15 battery and rotate them so no single pack takes every cycle. Store spare batteries in a cool, dry place with the terminal cover on, and charge them to roughly half capacity if they will sit unused for months.
Pre-owned batteries can lose capacity over time. If a battery that used to fill your camera now dies after a short session, it is a candidate for replacement rather than a charger problem.
Step-by-step safe charging routine
- Inspect the battery and charger: Confirm the battery is an EN-EL15 variant and check both sets of contacts for dirt or damage. Wipe with a dry cloth only. If the label is unclear or contacts are corroded, do not charge until you verify compatibility.
- Set the charger on a hard surface: Choose a cool, ventilated spot near a wall outlet, away from direct sun and flammable materials. Never charge on a bed, sofa or inside a closed bag.
- Insert the battery and plug in: Slide the EN-EL15 into the MH-25A until it seats, then plug the charger directly into a wall outlet. The indicator should blink to show charging has started.
- Wait for the steady light: Leave the battery until the indicator stops blinking and stays on. Do not interrupt the cycle unnecessarily. A steady light means the charge is complete.
- Remove and unplug promptly: Take the battery out, unplug the charger, and let both cool before packing them away. Leaving batteries on the charger for days adds no benefit and can shorten pre-owned battery life.
Product facts
- Nikon MH-25A Battery Charger for D7000/D750: The Nikon MH-25A Battery Charger is designed for Nikon EN-EL15 camera batteries and is built for dependable, efficient charging. It is the correct charger for EN-EL15 batteries used in the D7000, D750 and D850, so you avoid mismatched third-party chargers.
- Nikon full frame D850 DSLR BODY (pre-owned): The Nikon D850 is a pre-owned full-frame DSLR with a 45.7MP BSI CMOS sensor and EXPEED 5 image processor. High-resolution bodies like the D850 draw power quickly, so keeping several EN-EL15 batteries charged on the MH-25A matters on long shoots.
