The Sena 20S EVO Bluetooth communication system keeps motorcycle riders connected with up to 13 hours of talk time. However, its Lithium-Polymer (Li-Po) battery degrades over time, leading to short runtimes, rapid drainage, or sudden shutdowns. Since actual standby times often fall short of expectations as the device ages, many users eventually need a battery replacement.
Common signs of battery failure include quick shutdowns after a full charge, frequent low-battery warnings, poor charging performance, and battery drain even when the unit is powered off. If a hardware reset and firmware updates fail to resolve these issues, a battery replacement is likely necessary.
Tools Required
- Precision screwdriver (Phillips or Torx T8)
- Thin spudger/prying tool or a jeweler’s screwdriver
- Compatible Sena 20S EVO replacement battery
- Optional: Opening picks and a camera to take reference photos
>>>New 1200mAh 20S-EVO Replacement Battery for Sena 20S EVO
Step-by-Step Guide
Critical Warning: Never remove the main cover without first detaching the 16-pin connector board, or you will risk damaging the pins.
- Power Off & Prep: Turn off the device and unplug any cables. Use a thin prying tool to gently lift out the 16-pin connector board (it is held in place with a light adhesive).
- Disassembly: Remove the five housing screws and carefully pry off the volume jog dial.
- Open the Case: Gently remove the main cover.
- Access the Board: Carefully lift the circuit board. Pay close attention to the position of the silicone gasket and keep it safe for reassembly while disconnecting the components.
- Swap the Battery: Peel off the tape securing the old battery, unplug it, and connect the new battery, ensuring correct polarity. Secure the new battery in place as needed.
- Reassemble the Interior: Put the gasket back in first, then reposition the circuit board and reconnect all components properly.
- Close the Housing: Reinstall the cover and screws, making sure the seals are completely intact to maintain weatherproof performance. Reattach the jog dial.
- Reinstall the Connector: Align the 16-pin connector board in the correct orientation and press it fully back into place.
- Charge & Test: Give the new battery a full charge, power on the unit, pair it with your devices, and test all functions to ensure stable operation.
Remember to take photos of each step for reference. Keeping all seals intact is crucial for preserving water resistance. Once completed, update your firmware and practice good battery management to maximize the lifespan of your new battery.