Voltgrade Sur-Ron Light Bee 81v 45ah Battery Upgrade

Depending on discharge current and riding style, you can get up to 50% more range from this voltgrade upgraded battery compared to the OEM battery. Actual results will vary based on terrain and riding style, but most users report significant range increases.

You can download the ANT BMS mobile app for Android or iPhone and connect to your voltgrade battery via Bluetooth to monitor it's status live. The app provides real-time data on voltage,balance, cell temperature, charge status, protection alerts and more.

No, because the stock OEM controller is not reprogrammable. This battery will only work with aftermarket controllers, for example Moxin, ASI, EBMX, TORP, KO, Nucular, FarDriver, etc.

Installation is straightforward and typically takes 30-60 minutes. The package includes all necessary components:

• Upgraded power harness replacment
• Upgraded breaker replacment
• Lid latch extender for a solid, rattle free fit
• Detailed user manual

Basic mechanical skills are recommended, but most users can complete the installation themselves.

All Voltgrade batteries are fully certified and tested for safety and transport:

• CE Certified - European safety standards
• UN38.3 Tested - Battery safety testing standard
• UN3480 Certified - Lithium battery transport certification

These certifications ensure the highest quality and safety standards.

This battery comes with a 1-year comprehensive warranty covering:

• Manufacturing defects
• BMS failures
• Performance issues
• Cell group voltage disbalance

The warranty does not cover physical damage, water damage, or improper installation, programming. Warranty claims require proof of purchase and are processed through our support team. You must contact us first.

The battery itself has an IP67 rating, meaning it's dust-tight and can withstand immersion in water up to 1 meter for 30 minutes. However, we recommend avoiding complete submersion and taking precautions in heavy rain. Always ensure all connectors are properly sealed after installation.

For optimal performance and longevity:

• Avoid complete discharge - recharge when battery reaches 20-30%
• Store in a cool, dry place when not in use at 60-70% SOC levels
• Only use battery charger supplied by voltgrade
• Monitor battery temperatures while riding, charging using the ANT BMS phone app. Do not charge the battery if it is hotter than 40°C. Let it cool first.
• Check cables and connectors periodically. Never pull on the cable to disconnect.
• Use the ANT BMS app to monitor cell balance weekly