eufy Security T8743 Rechargeable Battery Pack, 6,200 mAh

The eufy Security T8743 Rechargeable Battery Pack is a USB-C rechargeable replacement or backup pack listed for the Video Doorbell E340 and C31. Its 6,200 mAh capacity and clasp-style installation suit buyers wanting a swap-in power option, though the claimed run time depends on use.

At a glance

USB-C charging uses a cable type the listing says is used with other devices.
The manufacturer claims up to 6 months of use from a single charge.
An intuitive clasp is designed to make fitting and removal simple.

Price

£17.99Save 40%

Reference price: ~~£29.99~~

Price checked: 12 Nov 2026

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Often bought together

eufy Security Video Doorbell E340, Dual Cameras with Delivery Guard 2K FHD | Wireless Doorbell, No Monthly Fee, Built-in 8GB, Wired or Battery Powered, Colour Night Vision, AI Motion/Package Detection

£89.99

eufy Video Doorbell Chime 2, 10 Built-in Chimes | 2.4 GHz and 5 GHz Dual-Band Wi-Fi Connectivity, Easy Setup, Bluetooth Auto-Pairing, Adjustable Volume up to 80 dB

£29.99

Pros and cons

Pros

The listed E340 and C31 compatibility gives existing owners a clearly targeted spare-power option.
USB-C charging avoids a proprietary charging connector claim.
The clasp design is described as quick to install and remove.

Technical specifications

8 specifications

Capacity and charging
Capacity	6,200 mAh
Charging connection	USB-C
Battery cell type	Lithium Ion

Compatibility and installation
Listed compatible doorbells	Works with eufy Video Doorbell E340 &C31
Installation feature	Intuitive clasp is designed to be simple and quick to use.

Dimensions and installation
Weight listed	150 g
Package dimensions	13.1 x 10 x 3 cm; 150 g

Identification
Model	T8743

What to know before buying

Listing details to confirm

The manufacturer claims up to 6 months per charge, while customer feedback reports varied experience, including both around 22 days and less than two weeks. Actual run time is not guaranteed and may depend on use.

Who is it for?

A good fit for

Owners of the eufy Video Doorbell E340 or C31 seeking a rechargeable spare or replacement battery.
Buyers who want USB-C charging and a clasp-style pack for quick swapping.

Less suited to

Owners of doorbell models other than the listed E340 and C31 unless compatibility is confirmed.

eufy Security T8743 Rechargeable Battery Pack, 6,200 mAh · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 1,322 ratings

5 stars77%77%
4 stars14%14%
3 stars4%4%
2 stars2%2%
1 star3%3%

Customer feedback describes easy installation and a good fit, with some customers reporting around 22 days of power and others saying the pack lasts less than two weeks. These differing experiences matter if you rely on long intervals between charging. The listing's up-to-six-month claim is a manufacturer claim, not a run time established by customer feedback.

Positive themes

Customers describe the pack as easy to install and report that it fits well.
Some customer feedback describes useful battery life and good value.

Negative themes

Some customers report that the battery does not last more than two weeks.

Mixed feedback

Reported battery life and durability vary, so experiences do not establish a consistent charging interval.

Frequently asked questions

Which doorbells is this battery pack listed for?

The listing names the eufy Video Doorbell E340 and C31. Confirm your exact doorbell model before ordering.

How is the battery charged?

The listing specifies USB-C charging. It does not state whether a cable or charger is included.

How long does one charge last?

The manufacturer claims up to 6 months, but customer feedback reports differing durations. Treat that figure as a maximum claim rather than a guaranteed run time.