Neewer

Neewer NB-Q4 Replacement Battery for Q4 Flash

4.5 (21 reviews)
2800mAh0.9lb

Keep your Neewer Q4 flash firing longer with this high-capacity 2800mAh replacement battery rated for 400 full-power flashes.

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Overview

The Neewer NB-Q4 is a purpose-built replacement battery for the Neewer Q4 400Ws 2.4G TTL flash strobe light. Rated at 21.6V and 2800mAh, it uses lithium-ion polymer cells to deliver up to 400 full-power flashes on a single charge—enough to cover most portrait sessions, event work, or product shoots without needing to stop and swap. At reduced power levels, the flash count climbs considerably higher, giving photographers extended runway during longer assignments.

Safety is addressed through a suite of built-in protections covering overcharge, over-discharge, overvoltage, overcurrent, and overheating scenarios. At just 0.9 lb (410g), the NB-Q4 adds minimal weight to your gear bag, making it a sensible spare to carry on location shoots where access to power outlets is limited. Keep in mind that no charging adapter is included with this battery—you will need the charger that shipped with your original Q4 flash or a compatible adapter purchased separately. Neewer also recommends a full initial charge before first use to maximize the battery's long-term health and cycle life.

Key Features

【Exclusively for Q4/Q4PRO Flash】 Only compatible with NEEWER Q4/Q4PRO 400Ws 2.4G TTL flash strobe light. Charging adapter is NOT included. Please use the adapter that came with your original Q4/Q4PRO Flash (sold separately)

【21.6V/2800mAh Li ion Battery】 This high capacity Li ion polymer battery uses high quality battery cells for extended run time

【400 Full Power Flashes】 One charge can give up to 400 times full power flash use, which can provide sufficient shooting time and improve your shooting experience

【Safety & Reliable】 Adopting high quality materials and advanced technology, the lithium ion battery features built in over charge, over discharge, over voltage, over current, and over heating protectionF

【Easy to Carry】 Lightweight at just 0.9lb/410g, with high energy density, high recycle life, and long lifespan, this replacement lithium battery is portable and convenient to carry with you

Specifications

Compatibility
Neewer Q4 400Ws 2.4G TTL Flash Strobe Light
Voltage
21.6V
Capacity
2800mAh
Battery Type
Li-ion Polymer
Full Power Flashes
Up to 400
Weight
0.9 lb / 410g
Model
NB-Q4

Pros & Cons

👍 Pros

  • High 2800mAh capacity delivers up to 400 full-power flashes per charge
  • Built-in protection against overcharge, over-discharge, overvoltage, overcurrent, and overheating
  • Lightweight at just 0.9 lb, practical to carry as a backup battery on location
  • Li-ion polymer cells provide high energy density and a long overall lifespan
  • Drop-in replacement that installs the same way as the original Q4 battery

👎 Cons

  • Only compatible with the Neewer Q4 flash, so it cannot be used with other strobe models
  • No charging adapter included, requiring you to already own or separately purchase the Q4 charger
  • Battery capacity is fixed at 2800mAh with no higher-capacity option available for extended shoots
  • No built-in charge level indicator on the battery itself

Frequently Asked Questions

No, the NB-Q4 battery is designed exclusively for the Neewer Q4 400Ws 2.4G TTL flash strobe light and is not compatible with other flash units.
No, a charging adapter is not included. You need to use the adapter that came with your original Neewer Q4 flash, or purchase one separately.
Neewer rates the NB-Q4 for up to 400 full-power flashes per charge. At lower power settings, you can expect significantly more flashes per cycle.
Yes, Neewer recommends fully charging the battery before its first use to ensure optimal battery longevity and performance.
The battery weighs approximately 0.9 lb (410g), making it easy to carry as a spare in your gear bag.