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White rectangular rechargeable battery pack with rounded edges and metal contacts

eufy

eufy Video Doorbell C31 Extra Battery Pack 6500mAh

SKU CH-HDQS-74A5B

A spare 6500mAh quick-release battery for the eufy Video Doorbell C31 providing backup power for 2K FHD video calls and motion recording

  • Connection protocolWiFi
  • Battery packIncluded
  • Product typeSmart Doorbell
  • Key features2k
  • Product dimensions5.83 × 2.07 × 1.23 in
  • Product weight0.57 lb (0.26 kg)
  • 2K FHD clarity captures every visitor detail
  • Live video call pops up on your phone
  • Two quick-release 6500mAh batteries for easy swaps
  • Hardwired option enables 24/7 recording with 5-second pre-roll
  • Works with Alexa and Google Assistant

Extra Battery Pack for eufy C31 Doorbell

This 6500mAh rechargeable battery pack is designed exclusively for the eufy Video Doorbell C31. It provides a spare or replacement power source so the doorbell remains operational while the original cell charges. The quick-release design lets homeowners swap cells in seconds without tools or wiring changes. Buyers who need a battery for a different doorbell model or a hardwired-only installation will not be able to use this pack.

Thermals Noise and Power Draw

The lithium-ion cell operates silently and generates no noticeable heat during normal doorbell use. Power is drawn only when the camera streams video, detects motion or rings the chime, so daily consumption stays low. There are no fans, pumps or moving parts to create noise. Users who require continuous 24/7 recording without hardwiring should note that battery life will decrease with frequent activations.

Deciding Specification 6500mAh Capacity

The single figure that determines suitability is the 6500mAh capacity matched to the C31’s dual-battery architecture. Each doorbell unit holds two cells, so this pack supplies one complete slot and restores the full wire-free runtime the manufacturer specifies. Without this exact capacity the doorbell cannot achieve its rated operating time between charges.

How it compares

Measured against everything we stock in Keyless Entry Locks & Readers, at today’s prices. Recalculated every night.

Price $109.99
Typical for this category: the median of 274 items is $105.49.

Specifications

Product
Brand nameEufy
Model nameEufy Video Doorbell C31
Part numberT8223
Product typeSmart Doorbell
Connectivity
Connection protocolWiFi
Power
Battery packIncluded
Size & build
Product dimensions5.83 × 2.07 × 1.23 in
Product weight0.57 lb (0.26 kg)
Compatibility
Alexa supportYes
Google Assistant supportYes
HomeKit supportNO

Questions about this item

How do I install the extra 6500mAh battery pack on the eufy Video Doorbell C31 and which step do people often miss?

Slide the quick-release battery into the doorbell until it clicks, then fully charge it before first use; the step many skip is that initial full charge.

What maintenance will the 6500mAh battery pack need over time?

Recharge the pack when the app shows low power; after several hundred cycles the capacity will drop and the pack should be replaced.

What limit appears first during sustained use of the 6500mAh battery pack?

Battery runtime is the first limit; continuous 2K recording and live calls drain the 6500mAh cells faster than standby, requiring periodic recharges.

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