Hello - I converted an old Trek hybrid with a Hilltopper (yeah, I know...I realize now there are better deals out there with better customer service) kit in 2020. If anyone is familiar, I have the "Sprinter" kit which has the stealth water bottle battery (5.4ah) and a 36volt, 350watt motor. I do like the kit because of it's stealth factor/light weight and I'm good with the power output as I didn't want a motorcycle type ebike (I like pedaling/biking 
) but I would like now a more powerful battery. I also don't want to spend $300 on another 5.4 ah battery. Apparently you can't use the Hilltopper "universal battery" replacement and also use the 5.4 water bottle kit simultaneously or it be an easy swap. So here I am stuck with this weaker battery with the only option given by the company to add another one. Anybody else been in this predicament?
I know there are options to buy a different controller and change batteries but I am pretty new to the tech and I am figuring out that there aren't many resources available to find out how to do this (why I am here)? There doesn't seem to be a controller for this battery (is it in the battery?) as it's basically just the battery, the bottle cage (with 2 prong electrical discharge and lock), and the motor (with wire connectors to the motor and the throttle - only). I have seen what look like identical kettle batteries and holders on Ali Express/other Chinese sites. Would these work as plug and play or would the controller (or whatever) need to be reprogrammed? Thanks in advance for your thoughts.
) but I would like now a more powerful battery. I also don't want to spend $300 on another 5.4 ah battery. Apparently you can't use the Hilltopper "universal battery" replacement and also use the 5.4 water bottle kit simultaneously or it be an easy swap. So here I am stuck with this weaker battery with the only option given by the company to add another one. Anybody else been in this predicament?I know there are options to buy a different controller and change batteries but I am pretty new to the tech and I am figuring out that there aren't many resources available to find out how to do this (why I am here)? There doesn't seem to be a controller for this battery (is it in the battery?) as it's basically just the battery, the bottle cage (with 2 prong electrical discharge and lock), and the motor (with wire connectors to the motor and the throttle - only). I have seen what look like identical kettle batteries and holders on Ali Express/other Chinese sites. Would these work as plug and play or would the controller (or whatever) need to be reprogrammed? Thanks in advance for your thoughts.
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