Garmin 361-00046-00 Battery Guide: Nuvi 3450 and Dash Cam 20 Checks

Looking for a Garmin 361-00046-00 replacement battery? Check the original battery label, exact device model, dimensions, and connections before ordering.

Review the STARNOVO 3.7V 1000mAh battery listed for Garmin Nuvi 3450 and Dash Cam 20, then compare it with your original battery.

Short runtime or charging problems do not necessarily mean the battery is the only cause. This guide is a purchasing checklist, not a shared teardown procedure for Nuvi navigators and Dash Cam devices.

1. Check the Exact Device Model

The linked product lists Garmin Dash Cam 20, Nuvi 3400, Nuvi 3450, Nuvi 3450LM, Nuvi 3450M, Nuvi 3490LMT, Nuvi 3550LM, and Nuvi 3750.

Do not extend this list to every Nuvi 3400, 3500, or 3700-series device, or to other Garmin dash cameras. Check the original battery even when your device model is listed.

2. Compare the Original Battery Specifications

• Battery part number: 361-00046-00
• Nominal voltage: 3.7V
• Stated capacity: 1000mAh
• Listed dimensions: 5.0 × 34.5 × 52.0 mm

Compare the original label, measurements, connector, wire arrangement, and polarity. Matching voltage or capacity alone does not establish compatibility. Ensure the battery fits without pressure on the cell or trapped wires. Do not force a plug or modify wiring to make an uncertain replacement fit.

3. Check the External Power Setup

Try a known-working compatible cable and power source, inspect the external connection for visible damage, and follow the troubleshooting instructions for your exact device. Note whether changing the cable or power source changes the fault.

A replacement battery will not necessarily fix a charging-port fault or another internal problem, and does not change the device’s intended external-power requirements.

4. Use Model-Specific Repair Instructions

A shared battery listing does not mean the devices have the same housing, internal layout, or repair procedure. This is an internal replacement battery that requires opening the device. Use verified instructions for your exact model or seek qualified repair assistance.

• Power off the device and disconnect external power before servicing.
• Do not pull on wires or force connections.
• Do not bend, puncture, crush, or apply heat to the battery.
• Stop if the replacement does not match the original arrangement or fit without pressure.

This guide does not establish screw locations, opening tools, adhesive-removal methods, or reassembly steps.

5. Set Realistic Runtime Expectations

The stated 1000mAh capacity does not guarantee particular operating hours, a specific runtime improvement, or a fix for unrelated faults. Runtime depends on device condition, settings, and usage. Follow the manufacturer’s charging instructions rather than deliberately deep-discharging the battery to “unlock” capacity.

6. Stop Using a Damaged Battery

If the battery is swollen, leaking, visibly damaged, or unusually hot, stop using and charging the device. Do not flatten, puncture, or force a swollen battery out of the housing. Seek qualified assistance.

Use an appropriate local battery collection or recycling service for the removed battery. Do not place lithium batteries in household waste.

7. Ask for Help Before Ordering

Email sales@starnovo.com with your exact device model, a clear original battery-label photo if safely accessible, photos of the connector and wire arrangement, and the original battery measurements if available.

For more checks, read our replacement battery buying guide. For charging and storage advice, see our battery care guide.