The old battery to them can offset part of the cost, you can use a lower price in exchange for a new battery, it sounds like they are very affordable, but it is not cost-effective, they actually take your old battery, to renovate it.
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In fact, there are many small ways to extend the life of the battery in life, you feel that your battery is not durable is broken, it is not necessarily, it may also be the electrolyte volatilization of the battery, we can go to the hardware store to buy a bottle of distilled water, the price is about two dollars, and then take the battery apart, put it into the static for an hour, In this way, the battery life can be increased for a long time. And not only by these, but also need you to develop a good habit when you usually ride, such as charging should not be charged for too long, generally 8 hours or so is enough, and after the battery car is used up, let the car \"rest\" and then charge, because the car is used up, the battery of the car must be very hot, at this time charging will cause damage to the battery.