eufy Security Video Doorbell E340 Kit with Battery: problems, parts and running costs

Checked: 2026-10-22

Summary

The E340 is a dual-camera battery doorbell (2K above the door, 1080p looking down at the step) with 8 GB of on-device storage and no subscription, and the part that goes wrong most is the battery: the quoted six months is a ceiling, owners report six to eight weeks per charge and 10–14 days on a busy entrance. There is no monthly fee, but replacement battery packs at about $39 each are the running expense, and it is a good buy at $100 or less, still reasonable up to $130 and weak above $170 unless the second camera and package detection are the reason.

Common problems and fixes

Color night vision is the softer mode — TechGearLab’s instrumented comparison found infrared night vision clearer than color, so night clips look softer in the default color mode. Fix: switch the night mode to infrared; the rated range is 16 ft (5 m). [7][1]
No HomeKit without a HomeBase, and no IFTTT or RTSP at all — Apple HomeKit works only through a HomeBase, and TechGenuinely lists the missing IFTTT and RTSP support among typical eufy doorbell problems; PCMag names the same two gaps as cons. Fix: add a HomeBase 2 or HomeBase 3 if those integrations matter, or accept that they are unavailable. [1][10][11]
Only the upper camera is 2K — the downward camera that watches the step for packages is 1080p (1600 × 1200), while the front camera is 2048 × 1536. [9][8][12]
Support is email-only for some owners — one owner who gave up after six months of poor experience describes eufy’s help as email-only. Fix: expect written support, and keep your own record of failures and dates. [14][7][1]
Old chimes and solar panels are not plug-and-play — the doorbell does not work with the original Wi-Fi Chime (T8020) or Chime (T8740/T8742); it does work with an existing chime, HomeBase S280/S380, Minibase Chime (T8023), Alexa and Google Assistant. A solar panel only counts if eufy lists it as compatible. [1][4]

Parts and consumables

Rechargeable battery pack (removable, about 6,500 mAh) — about $39 for a spare at eufy (October 2026), and this is the part that comes on a schedule: owners who get six to eight weeks per charge will need several a year. [16][4][5]

Yearly running cost

Recording, live view and the person, package and animal detection all work without a subscription, so there is no monthly fee. The running cost is the battery: a spare pack is about $39 at eufy (October 2026), and at the six to eight weeks per charge owners report, a year of use comes to roughly 6 to 9 packs. Where the door sees heavy traffic and the battery lasts 10–14 days, the same figure multiplies several times over. Electricity is negligible, since the manufacturer rates the unit at 1 W.

When it is a good buy

eufy.com listed the standalone battery unit at $169.99 in October 2026, and eufy’s own blog has featured it at $119.98. Tom’s Guide covered Black Friday and Prime Day sales of this doorbell. In that coverage the price was $119.99 from eufy, $99.99 at Walmart and $139.99 at Target.

At $100 or less the E340 is strong value: a dual-camera 2K doorbell with color night vision, an IP65 rating, free local storage and no subscription. Up to $130 it stays good, especially if package detection and a removable battery are what you are buying. Between $130 and $170 it is fair value, and above $170 the dual camera and package detection have to be the reason.

Two alternatives. Ring, when you want a single-camera doorbell and the wider third-party support this unit lacks, since it has no IFTTT, no RTSP and HomeKit only through a HomeBase — owners moving from Ring name motion detection, video quality and the absence of a monthly fee as the reasons they stayed with eufy. And the eufy Floodlight Camera E340 (T8425), when the entrance needs a floodlight rather than a chime, since it is a separate product from this doorbell.