I have purchased two types of triangle batteries here, hard shell triangle and soft pack triangle, both of them are very good.    They has provided very good service, they are so patient and helpful, thanks so much for her help, she always gives me suggestions and answers in time.     The quality of the batteries is also very good, the packaging is perfect, batteries with their chargers and all the mounting accessories are excellent.

I got the original Samsung 21700 50G cells I ordered (I opened to check and verify) and the battery have a very good range.    my battery is 30Ah 52 volt.    I use a Tongsheng TSDZ8, 750 watt mid hub motor.    I weigh 86 kg and I get a range of about 180 km per charge riding in the mountains around my home I attached a screen shot from the battery app(connected by bluetooth to my mobile phone app) showing the voltage level after riding for a while to show how similar the voltage level of various groups of cells are indicating a high and consistent quality of the cells used..    All in all a top notch battery I can only highly recommend.