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SkyBell Trim Plus WiFi Doorbell Compatible Battery 3.7V 500mAh

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From $23.99 USD $29.99
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Fits SkyBell Trim Plus WiFi Video Doorbell, replaces OEM part SNO-602535P battery.
This 3.7V, 500mAh lithium-polymer cell powers the doorbell's video sensor and wireless transmission.
Connector slides into the vertical battery slot with locking tab on the right side.
We ran a full discharge cycle on the bench — BMS held stable until final 5% cutoff.
On first install, power cycle the doorbell once through the SkyBell app so firmware registers the new cell before motion detection logging activates.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.7V

Amp

500mAh

SkyBell Trim Plus WiFi Video Doorbell — 3.7V Li-Polymer Replacement Battery (SNO-602535P)

This is a 3.7V, 500mAh Li-Polymer battery for the SkyBell Trim Plus WiFi Video Doorbell. It replaces OEM part SNO-602535P directly. The Trim Plus is a wired-assist smart doorbell that combines a camera, IR LEDs, and a WiFi radio — all running off this compact 37.00 × 25.10 × 6.00mm cell.

  • Trim Plus platform fit: The Trim Plus packages its processor, IR emitters, and WiFi module into one tight assembly. All three share the same cell. Voltage tolerance on this platform is narrow — the BMS will cut power if the cell voltage drifts outside spec, so cell matching matters.
  • Bench tested on actual hardware: We ran this cell through motion-trigger cycles and sustained IR recording loads. The BMS held cutoff at the correct threshold under both low-draw standby and the combined spike from IR plus WiFi transmission.
  • First-install power cycle: After fitting this battery, force a full power cycle through the SkyBell app before relying on motion alerts. The firmware must re-register the cell before motion events log correctly to cloud storage — skipping this step causes silent recording gaps.

Camera going offline in the SkyBell app after battery swap

Swapping the battery clears the active firmware session on the Trim Plus. When power is interrupted, the device loses its authenticated token with the SkyBell cloud. The camera reconnects to WiFi but the app still shows it offline because the session hasn't re-registered. Open the SkyBell app, go to Device Settings, and trigger a soft restart — this forces a fresh handshake and brings the camera back online.

App showing 0% or stuck percentage after installing a new cell

The Trim Plus uses a voltage-threshold indicator, not a fuel-gauge IC. After a new battery goes in, the firmware reads raw cell voltage and maps it to a percentage — but that mapping only calibrates after one full charge-discharge pass. Until then the app can report 0%, 100%, or a frozen number. Run the doorbell through one complete cycle from full charge down to the automatic low-voltage cutoff, then recharge fully, and the percentage display will track correctly from that point.

Compatible Models

Trim Plus WiFi Video Doorbell

Replaces Part Numbers

SNO-602535P

Technical Specifications

Voltage3.7V
Amp Hours500mAh
Capacity500mAh
Rate1.85Wh
Net Weight11g /0.39 oz
Gross Weight36g /1.27 oz
Approximate Weight36g /1.27 oz
Dimension 37.00 x 25.10 x 6.00mm

Product Highlights

  • Brand: SkyBell
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My SkyBell Trim Plus stops recording partway through a motion clip — what's cutting it off?

Mid-clip dropout on the Trim Plus is usually a BMS trip caused by the WiFi reconnect current spike during weak-signal conditions. When the signal drops briefly, the radio ramps power to re-establish the connection — the combined draw from WiFi, IR LEDs, and the processor briefly exceeds the BMS threshold and cuts the cell. Move your router closer or add a WiFi extender within range of the doorbell, and check that the cell voltage at rest is above 3.5V before ruling out a degraded cell.

The IR night vision kicks on but the camera goes to sleep a few hours after dark — is the battery draining too fast overnight?

Sustained IR LED draw is the highest constant load the Trim Plus puts on this cell, and a degraded original battery often can't hold the voltage rail steady through a full night. The BMS interprets the sag as a low-cell condition and shuts down to protect the cell. With a fresh 500mAh cell at full charge, the voltage should hold above 3.6V through normal overnight IR operation — if it still sleeps, check the doorbell's motion sensitivity setting, as continuous IR with no sleep interval will accelerate discharge on any 500mAh cell.

Motion alerts stopped firing after I replaced the battery, but the live view still works — why?

Live view and motion alerting use different firmware processes on the Trim Plus. Motion detection depends on the IR sensor and the processor logging a trigger event to the cloud — if the firmware session wasn't re-registered after the battery swap, the motion pipeline stays inactive even though the video stream runs fine. Go to Device Settings in the SkyBell app and perform a soft restart to re-register the session, then walk a test pass in front of the doorbell to confirm the alert fires.

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