... 2.Quick release folding mechanism.28AH,33AH battery, Score Card Holder , Cup holder Umbrella holder, Trolley Bag ,RainCover ,Luxurious seat ... battery make you win always. 5.Detachable wheels and assistant wheel to keep your trolley walking smoothly. 6.Adjustabel battery holder ... for different dimension battery. 7.Most durable clutch; 8.Stable ...