Blink Battery Doorbell 2K+
By Blink · Video Doorbells · Cleaning & Smart Home
- Camera: 1920p HD color at 1:1 head-to-toe aspect ratio, up to 25 FPS
- IP-65 weather-resistant, operating range -5° to 113° F (-20° to 45° C)
Lowest price seen
~$79.99 (approx.)
from $79.99 at Amazon
- Amazon ~$79.99 (approx.)View at Amazon
- Blink (Amazon)View at Blink (Amazon)
- eBayView at eBay
- eBay (used) eBay: used, open-box, refurbishedView at eBay (used)
Prices are snapshots. Check the current price with the store.
Summary
A battery-first 1:1 video doorbell for homes already on Blink, with 1920 × 1920 head-to-toe video and a required Sync Module. Check your hub and your Wi-Fi before buying: the common bundle includes a Sync Module Core that cannot record locally, and the doorbell runs on 2.4 GHz only.
Strengths
- The 1920 × 1920 frame and 1:1 framing show visitors head to toe.
- Battery life is long on paper: up to 16 months at top quality on Blink’s default-use assumptions.
- Local recording is possible without a subscription when paired with a Sync Module 2 or XR and removable storage.
- Owners praise quick setup, responsive motion detection and the sharper 2K image.
- It installs completely wire-free, or on existing wiring with the batteries kept as backup.
- Alexa integration covers live view, doorbell announcements and automatic live view on compatible Echo Show devices.
Weaknesses
- Moving subjects blur; Tom’s Guide saw it while people were walking.
- Wi-Fi is 2.4 GHz only, with no 5 GHz fallback on congested networks.
- The required Sync Module is not built in, and the common Core bundle cannot record locally.
- Advanced AI features sit behind a subscription.
- Recent owners report lag, delayed live view, missed recordings and dropped connections.
- The supplied removal tool can pop the doorbell off its plate, and one owner released it with a fingernail.
Verified specifications
| Model | Blink Battery Doorbell 2K+, third generation, BDM00400U for the US, Canada and Mexico. |
|---|---|
| Video | 1920 × 1920 color at up to 25 fps, 1:1 head-to-toe framing. |
| Field of view | 140° horizontal and 173° diagonal. |
| Motion detection | PIR, with up to 33 ft cross-detection and over 6.5 ft approach detection when mounted 48 in high. |
| Audio | speaker output and two-way audio. |
| Power | three Energizer AA 1.5 V lithium non-rechargeable cells; they stay required even when wired. |
| Wiring | US 12–24 VAC doorbell wiring can be connected, but the AA cells remain and act as backup. |
| Sync Module | required; compatible with Sync Module 1/2, Core and XR. |
| Local storage | Sync Module 2 with a USB drive, or Sync Module XR with a microSD card; Sync Module Core does not support Local Storage or Clip Backup. |
| Wi-Fi | 802.11b/g/n, 2.4 GHz only. Blink lists 2 Mbps minimum upload; support suggested about 6 Mbps for smoother 2K streaming. |
| Weather and temperature | IP65; -5°F to 113°F (-20°C to 45°C). |
| Battery estimate | up to 16 months at 1920 × 1920, 19 months at 1440 × 1440, 22 months at 960 × 960, on Blink’s default-use assumptions. |
| Dimensions | 1.89 in wide × 5.19 in long × 1.34 in deep; 4 oz (113 g). |
| In the box | doorbell, three AA lithium batteries, wall plate, mounting hardware, drill template and removal tool. |
| Warranty | one-year limited in the US; Blink states security updates for at least four years from purchase. |
| Optional mounts | a wedge changes the vertical angle by 5°, a corner mount changes the horizontal angle by 25°. |
Full research notes and sources
Battery life and settings
Blink’s headline is up to two years, but its FAQ gives the better planning numbers: about 16 months at 1920 × 1920, 19 months at 1440 × 1440 and 22 months at 960 × 960 under default-use assumptions. Battery life tracks video quality and how much activity the door sees. Wiring the doorbell to a 12–24 VAC transformer does not turn it into a wired unit; the AA cells remain required and act as backup. The default clip runs 10 seconds; one owner pushed it to 20 seconds and noted the effect on battery life.
Video and motion
The 1920 × 1920 image at up to 25 fps with 140° horizontal and 173° diagonal coverage is the main upgrade over older Blink doorbells. Tom’s Guide tested it for two weeks and found daytime image quality good enough to identify visitors, with sharper detail once subjects stop moving. Motion blur was visible while people walked, and night footage leaned on infrared rather than useful color, so 2K resolution does not guarantee sharp moving-person capture.
The hub, local storage and running costs
A Sync Module is mandatory and adds another powered device and wireless link. The common retail bundle includes Sync Module Core, which does not support Local Storage or Clip Backup, so no-subscription recording needs a Sync Module 2 with a USB drive or a Sync Module XR with a microSD card. Both accept 1 GB to 256 GB, and Blink recommends at least 10 Mbps read/write for the microSD path. Local Storage stops when the removable drive fills; Blink does not overwrite old local clips.
Day-to-day cost is mainly the three Energizer AA lithium cells plus any optional subscription. Target listed a four-pack of Energizer Ultimate Lithium AA batteries at $11.39, or about $2.85 each, which puts a three-cell change near $8.54. On Blink’s nominal estimates the annual battery cost is about $6.40 at 16-month life, $5.39 at 19 months and $4.66 at 22 months, though frequent motion, longer clips, cold weather and more live viewing push it higher. A subscription is optional for basic live use and for local recording with the right hub. US standard plans are $3.99 a month or $39.99 a year for Basic on one device, and $11.99 a month or $119.99 a year for Plus on unlimited eligible devices. AI plans are $6.99 a month or $69.99 a year, and $19.99 a month or $199.99 a year, with advertised first-year annual prices of $49.99 and $149.99. A one-doorbell household on Basic annual plus batteries runs about $44 to $46 a year; Basic AI runs about $74 to $76 after the first-year promotion.
Repairs and support
There is no user-replaceable camera sensor, radio or PIR module documented by Blink, so repair means replacement. Blink systems carry a one-year limited US warranty, and the company directs retailer-purchased customers back to the retailer for returns. Security updates are provided for at least four years from new purchase. The Plus and Plus AI plans can extend eligible-device coverage when a device is added inside its original one-year warranty, through an included Allstate service contract. Owner support experiences are mixed: one verified buyer reported no resolution after spending time with support on connectivity, while another support reply acknowledged a replacement unit could be appropriate after network and settings checks.
Which model this is
This page covers the Blink Battery Doorbell 2K+, third-generation model BDM00400U for the US, Canada and Mexico. It is not the lower-resolution Blink Video Doorbell (2nd Gen), and it is not the wired-only Blink Wired Doorbell 2K+. The battery model keeps working the same way whether or not it is wired.
Sources
Manufacturer:
- Blink Battery Doorbell 2K+ technical specifications
- Blink Battery Doorbell 2K+ FAQ
- Blink storage options
- Blink Sync Module Core FAQ
- Blink Wired Doorbell 2K+ technical specifications
- Blink smart security plans
- Blink return policy and one-year limited warranty
- Blink device software security updates
Independent reviews:
Owner reports:
- Blink Battery Doorbell 2K+ owner feedback (Target)
- Battery Doorbell 2K+ motion notifications failure (r/blinkcameras)
- Battery-status reporting discussion (r/blinkcameras)
- Blink Battery Doorbell 2K+ owner reviews (Best Buy)
Parts and stores:
