Warranty terms decide who pays when an electric motorbike goes wrong, and with electrics the interesting clauses are all about the battery. Here is what the manufacturers publish, and how service differs from the petrol world.

What official terms look like

Dat Bike publishes the most specific customer terms we have verified: a 3-year battery warranty, a 48-hour nationwide on-site warranty, and a 2-day, 100 percent refund return policy on new bikes. The battery is the flagship clause because it is the expensive part — capacity fade and cell faults are the risks a warranty must absorb.

VinFast’s swap-model riders get a different protection: rented batteries (175,000-300,000 VND per month) are maintained by the operator, so pack health and degradation are the network’s problem, not the owner’s. That is a maintenance transfer, not a warranty, but it plays the same role.

What to check before you buy

  1. Battery warranty length and what it covers — capacity percentage guarantees, cell replacement, labour.
  2. Whether the warranty transfers to a second owner, and on what terms.
  3. Service reach — on-site terms like Dat Bike’s 48-hour commitment, or dealer-network coverage for your area.
  4. Exclusions — water immersion, unofficial chargers, tampering and accidents are standard carve-outs.
  5. Return windows — some makers offer refund periods; keep the paperwork.

How service differs from petrol

There is no oil or carburettor work, so routine servicing is lighter: brakes, tyres, suspension, connectors and software. But high-voltage diagnosis needs brand-specific tools — independent shops cannot always help. For rental riders, the practical version of all this is simple: report issues early, keep the bike stock, and let the maintenance obligations fall where the contract puts them.