Quick answer

To keep Nikon EN-EL15b or EN-EL15c batteries ready, charge them fully before a shoot, store them at room temperature, and use a charger designed for those exact cells. The Nikon MH-34 is the wall charger made for EN-EL15b and EN-EL15c batteries, but it needs a compatible USB power delivery source and the right cable. For travel, a compact third-party charger like the Premium Tech PT-66 can be a practical backup for Panasonic BLC-12 batteries.

How to charge a camera battery without damaging it

Match the charger to the battery model first. The Nikon MH-34 is built for EN-EL15b and EN-EL15c lithium-ion batteries, so it will not correctly charge older EN-EL15 or EN-EL15a versions. Plug the charger into a USB power delivery source, then insert the battery and let it charge until the indicator shows full. Avoid charging in a hot car or in direct sun, because heat is harder on lithium-ion cells than the charge cycle itself. If you are charging a Panasonic BLC-12 battery instead, the Premium Tech PT-66 travel charger plugs directly into a wall outlet or a car cigarette lighter and charges that battery in roughly 60 to 90 minutes.

What you need to know about the Nikon MH-34 charger

The MH-34 does not plug straight into a wall outlet on its own. It requires an EH-8P AC adapter, an EH-7P charging AC adapter, or a third-party AC adapter that supports USB power delivery. If you plan to use it with the EH-8P, you also need a separately purchased UC-E25 USB cable. That means the charger is best thought of as one part of a charging kit, not a standalone wall unit. Before you buy, check which adapters and cables you already own so you do not end up with a charger you cannot power.

Everyday camera battery care habits that actually help

Charge batteries before a shoot rather than topping them off every day. Lithium-ion cells age faster when they sit at 100 percent for long periods, so if you are not shooting for a while, aim to store them around half charge. Keep contacts clean and dry, and avoid leaving batteries in a bag that gets left in a hot trunk. When you carry a camera, a wrist strap such as the Peak Design Cuff keeps the camera secure and close, which reduces the chance of dropping it and damaging the battery door or contacts. Label your batteries so you can rotate them and spot the ones that no longer hold a full charge.

Travel charging: what to pack and what to check

For travel, a compact charger that accepts 110/240v is easier to live with than a full kit. The Premium Tech PT-66 Travel Charger includes a universal AC power source, a European adapter plug, and a car adapter, and its flat-pin foldable design stores easily. If you shoot Nikon EN-EL15b or EN-EL15c batteries, remember that the MH-34 still needs its own power delivery source and cable, so pack those too. Check that your hotel room or rental car has a USB-C power delivery outlet or a 12V socket before you rely on one charging method.

Camera battery charging FAQ

Can I charge an EN-EL15 battery in the Nikon MH-34?

The MH-34 is designed for EN-EL15b and EN-EL15c batteries. Older EN-EL15 and EN-EL15a versions are not listed as compatible, so use the charger that came with those batteries instead. Check the exact battery version printed on the label before charging.

What else do I need to use the Nikon MH-34?

You need a compatible power source: an EH-8P AC adapter, an EH-7P charging AC adapter, or a third-party AC adapter that supports USB power delivery. With the EH-8P, you also need a separately purchased UC-E25 USB cable. Treat the MH-34 as part of a kit, not a standalone wall charger.

How long should I charge a camera battery?

Charge until the charger indicates full. The Premium Tech PT-66 charges a Panasonic BLC-12 battery in roughly 60 to 90 minutes. Charging longer than needed does not improve capacity and can add unnecessary heat. Unplug or remove the battery once charging is complete.

Is it bad to leave a camera battery fully charged?

Lithium-ion batteries age faster when stored at 100 percent for long periods. For storage between shoots, aim for about half charge and keep batteries at room temperature. Charge fully right before a shoot, not weeks in advance.

Can I use a third-party charger for Nikon batteries?

Only if the charger is explicitly made for the EN-EL15b or EN-EL15c battery. A charger built for a different battery model may not fit or may charge unsafely. Match the charger to the battery model, not just the brand.

Chargers and a strap worth knowing

  • Nikon MH-34 Battery Charger: The Nikon MH-34 Battery Charger is a wall charger specifically designed for charging EN-EL15b and EN-EL15c lithium-ion batteries. It needs to connect to an EH-8P AC adapter, EH-7P charging AC adapter, or a third-party AC adapter that supports USB power delivery. Using it with an EH-8P also requires a separately purchased UC-E25 USB cable. If you own EN-EL15b or EN-EL15c batteries, this is the matching charger, but you must already own or buy a compatible power adapter and cable before it will work.
  • Premium Tech PT-66 Travel Charger for Panasonic BLC-12 Battery: The Premium Tech PT-66 Travel Charger plugs directly into your wall outlet or your car's cigarette lighter and charges a Panasonic BLC-12 battery in approximately 60 to 90 minutes. It includes a universal 110/240v AC power source, a European adapter plug, and a car adapter, and its flat-pin foldable design makes it compact for storage. A practical travel option if you shoot Panasonic BLC-12 batteries and want one charger that works in a wall outlet or a car without extra adapters.
  • Peak Design Cuff Camera Wrist Strap (Ocean): The Peak Design Cuff Camera Wrist Strap in Ocean offers a secure wrist-loop design that keeps the camera firmly attached during movement, a quick-release mechanism for detaching the camera swiftly, and adjustable length for a customized fit. A secure wrist strap reduces the chance of dropping your camera while changing batteries or handling it one-handed, which helps protect the battery compartment and contacts.