What causes Lead-acid battery pack degrades, loses range on the Sunra Robo-s (electric Moped)?

Ride full range, check voltage sag under throttle Estimated fix cost: $250-$600

What causes Controller or throttle cuts power intermittently on the Sunra Robo-s (electric Moped)?

Hard acceleration from stop, look for stutter Estimated fix cost: $80-$200

Spin wheel, listen for grinding, check seals Estimated fix cost: $150-$400

Lever travel, pad thickness, rust on fasteners Estimated fix cost: $40-$120

Known issues to inspect before buying a used Sunra Robo-s (electric Moped). What to check and how much repairs cost.

SERIOUS

Ride full range, check voltage sag under throttle

Fix cost: $250-$600

MODERATE

Hard acceleration from stop, look for stutter

Fix cost: $80-$200

MODERATE

Spin wheel, listen for grinding, check seals

Fix cost: $150-$400

MINOR

Lever travel, pad thickness, rust on fasteners

Fix cost: $40-$120

☐Verify battery age and charge cycles

☐Test full-throttle acceleration and top speed

☐Inspect charger, port, and wiring

☐Confirm parts availability from local dealer

Budget commuter; battery and parts support are weak