Eufy Security Smart Lock E330 (Video).

The Gavler Review.

Eufy Security Smart Lock E330 Review: A Great Lock, an Honest Battery Problem

The Eufy Security Smart Lock E330 (Video) ranks number 7 on Gavler's Best Smart Locks list with an 8.3. It's the no-subscription answer to Lockly's Vision Elite one rank above it — a fingerprint deadbolt with a built-in 2K video doorbell that stores footage locally instead of charging you a monthly cloud fee. The Gadgeteer's hands-on test found the core experience close to flawless, then ran directly into the one problem that colors the whole recommendation: battery life. As reviewer Garry Kolb put it after eleven days of testing, "I really wanted to like the eufy Video Smart Lock E330. It looks good and works great. But...the battery life is a deal breaker for me."

What it is

The E330 combines a full-replacement deadbolt with an integrated 2K camera, 2-way audio, and a doorbell button in a single tall panel mounted outside the door. Unlock methods include the eufy Security app, fingerprint (0.3-second response per Eufy's spec, storing up to 50 fingerprints), a personal PIN code, Apple Watch, voice via Alexa or Google, or a physical key hidden behind the swiveling doorbell button. Power comes from a 10,000 mAh rechargeable battery pack with a USB-C emergency charging port for when it runs low unexpectedly.

Video storage is local — 8GB onboard, no required Eufy Cloud subscription — which is the E330's clearest differentiator against subscription-based lock-camera combos. It integrates with Alexa and Google, but notably not with Apple HomeKit, IFTTT, or Matter, a real limitation for buyers already invested in Apple's smart home ecosystem.

In use

The Gadgeteer's review is the most thorough independent account available, and the day-to-day performance holds up well across the board. "Let me make this simple," Kolb wrote. "The eufy E330 Video Smart Lock just works. It does everything it says. I cannot argue with the 0.3-second fingerprint recognition claim. It is blazingly fast." He integrated it with Alexa for nightly auto-lock confirmation, ran a 10-minute auto-lock timer that fired reliably every time, and found the camera did "a terrific job picking up humans while ignoring cars driving by," with notifications arriving "nearly instantaneously." Installation took about 20 minutes with a Phillips screwdriver, with one wrinkle — the strike plate hole needed slight enlarging on his door, a five-minute fix with a rotary tool.

Then the battery testing began. Kolb installed the lock fully charged on a Saturday and, by the following Wednesday — 11 days later — the app reported 42% remaining. He did the math: "That's 58% use in 11 days or more than 5% battery life lost per day. I'm no math major, but 5% per day is more like 20 days and a lot less like 8-12 months." He contacted Eufy support, swapped in a second fully charged battery pack, and tracked usage against the app's own event log — finding the battery dropped 7% in 27 hours despite the lock recording zero video events and registering only a handful of manual lock/unlock actions that didn't even use the motor.

Strengths

Beyond the battery issue, the fundamentals are strong. Fingerprint recognition speed and accuracy drew no complaints in testing, the 2K camera and 2-way audio performed reliably, and local storage with no required subscription is a real, ongoing cost savings against Lockly's cloud-dependent competitor. Installation is straightforward for anyone who has replaced a deadbolt before, and the included physical-key fallback and USB-C emergency charging port both address the realistic failure modes of a battery-powered smart lock.

The trade-offs — who should skip it

The battery finding is specific and reproducible in Kolb's testing, not a one-off unit defect — he isolated it by turning off individual features one at a time. Disabling the video system entirely (leaving it to trigger only on doorbell presses) stretched runtime to an estimated 50 days. Turning off auto-lock and all notifications on top of that got the battery to hold at 90% after a day and a half. But that means the only way to approach Eufy's advertised 8-12 month runtime is to disable the auto-lock, motion detection, and notification features that are the actual reasons to buy a video smart lock over a plain fingerprint deadbolt. Kolb's own conclusion was blunt: he bought Eufy's non-video S230 lock for his garage door instead, and said if he were choosing again, he'd skip the E330's video features entirely rather than accept the battery trade-off. If you travel for three weeks or more at a stretch, as Kolb does, budget for a charging routine every two to three weeks, or look elsewhere.

How it compares

The direct competitor one rank up is the Lockly Vision Elite, ranked number 6 on this list at $399 — a similar 1080p camera-plus-lock combo with a five-method entry system including a randomized PIN keypad designed to defeat shoulder-surfing. It costs $120 more than the Eufy and its camera resolution is lower, but it's worth comparing battery-life claims directly against Eufy's documented shortfall before deciding between the two.

For buyers who want Apple Home Key support that neither camera-lock combo offers, the Aqara Smart Lock U200 ranks number 1 on this list at $229 — native NFC Home Key, Matter-over-Thread with no hub required, and a retrofit install over your existing deadbolt. It has no built-in camera, so pairing it with a separate video doorbell from Gavler's Best Smart Doorbells list is the unbundled route to Home Key support plus video coverage that the E330 and Lockly can't offer.

The Gavler verdict

The Eufy Security Smart Lock E330 does almost everything right on paper and in daily use — fast, reliable, no subscription fees, and genuinely useful video coverage of your front door. But The Gadgeteer's independently reproduced battery testing is hard to argue with: real-world runtime with standard features enabled lands closer to three weeks than the advertised 8-12 months, and getting anywhere near that advertised figure requires switching off the camera functionality that justifies paying for this lock over a plain fingerprint deadbolt. Buy it if you're home often enough to recharge every few weeks and you specifically want local, subscription-free video storage. If you travel for extended stretches, this is the one honest reason to look at Eufy's non-video lock lineup, or a different lock entirely.

Common Questions

Is the Eufy Security Smart Lock E330 worth it in 2026?

Yes, if you want a lock and doorbell camera in one device with no monthly subscription. The Gadgeteer's hands-on test found it 'just works' day to day — fast fingerprint recognition, instant notifications, clear video — but the same reviewer flagged battery life as a genuine deal-breaker for anyone who travels for extended periods.

How bad is the E330's battery life, really?

Worse than advertised in real-world testing. Eufy claims 8-12 months per charge; The Gadgeteer's Garry Kolb measured the battery dropping from full to 42% in just 11 days with standard settings enabled, writing 'that's 58% use in 11 days or more than 5% battery life lost per day... 5% per day is more like 20 days and a lot less like 8-12 months.'

Can I extend the E330's battery life?

Yes, but at a real cost to functionality. The same testing found that disabling video recording, motion notifications, and auto-lock stretched the battery to roughly 90% after a day and a half — meaning you have to turn off the camera features that justify the lock's price to get anywhere near reasonable battery life.