How to Pick an External Battery Pack for Flash or Camera
By The Camera Exchange | Published: 2026-10-25
Category: Buying Guides
Choosing the right external battery pack for your flash or camera depends on your gear's power needs and mounting options. This guide explains the key differences between V-Mount, NP-F, and dedicated flash batteries.
Quick answer
For a dedicated flash like the Godox AD400Pro, choose the Godox Li-Ion Battery for AD400Pro Flash Head. For a more versatile power source that can run a camera or accessories, consider a V-Mount battery such as the SmallRig VB99 SE Mini V-Mount Battery, paired with an adapter plate if needed.
Understanding Your Power Needs
The first step is identifying what you're powering. A dedicated flash battery—like the one for the Godox AD400Pro—is designed to match the voltage and connector of that specific flash head, offering seamless integration and reliable runtime. It's a no-fuss solution if you own that flash.
If you need to power a camera body, monitor, or other accessories, a V-Mount or NP-F battery gives you flexibility. V-Mount batteries (e.g., SmallRig VB99 SE) are common in video rigs and can be mounted directly or via a plate. NP-F batteries (e.g., ProMaster USB-C NP-F570) are smaller and often used for on-camera lights or smaller devices.
Capacity vs. Portability Trade-off
Higher capacity batteries (like the 6800mAh SmallRig VB99 SE) run longer but add weight and bulk. They're ideal for all-day shoots or power-hungry setups. Lower capacity batteries (like the 2600mAh ProMaster NP-F570) are lighter and more compact, making them better for travel or quick run-and-gun work.
Consider your typical shooting duration and whether you can swap batteries easily. If you're on a tripod or rig, a larger V-Mount battery is fine. If you're handheld, you might prefer a lighter NP-F option.
Mounting and Compatibility
V-Mount batteries require a V-Mount plate or adapter on your camera rig. The SmallRig L-Series/NP-F Battery Adapter Plate (Advanced Edition) can convert an NP-F mount to accept V-Mount batteries, expanding your options. Check your camera or flash's mounting system before buying.
Dedicated flash batteries like the Godox AD400Pro battery slide directly into the flash head—no extra plates needed. This simplicity is a major advantage if you only need to power that one device.
Decision rules for choosing your external battery pack
- Rule 1: Match the connector: If your device has a dedicated battery slot (like the Godox AD400Pro), buy the matching battery. If it uses a standard mount (V-Mount or NP-F), choose a battery that fits that mount.
- Rule 2: Choose capacity based on your shoot length: For all-day shoots or power-hungry gear, go with a high-capacity V-Mount battery (e.g., 6800mAh). For short sessions or travel, a smaller NP-F battery (e.g., 2600mAh) is lighter and easier to carry. If you're unsure, a mid-capacity V-Mount battery often provides the best balance.
- Rule 3: Consider future expandability: A V-Mount battery with an adapter plate can power multiple devices over time. A dedicated flash battery is limited to that one flash model.
Product facts at a glance
- Godox Li-Ion Battery for AD400Pro Flash Head: Price Guarantee Rent Now This dedicated battery is purpose-built for the AD400Pro flash, ensuring a perfect fit and reliable power without extra adapters.
Godox Li-Ion Battery for AD400Pro Flash Head - SmallRig VB99 SE Mini V-Mount Battery (6800mAh): Price Guarantee Rent Now At 6800mAh, this mini V-Mount battery offers high capacity in a compact form, making it a versatile power source for cameras, monitors, and lights.
Who should choose which battery?
Best for
- Photographers who own a Godox AD400Pro and want a drop-in battery without extra gear
- Videographers or hybrid shooters who need a versatile power source for cameras, monitors, and lights
Not for
- Shooters who only need to power a small on-camera light—a smaller NP-F battery is lighter and cheaper
