You've Been Warned -- Avoid SPS
Lasted 18-months before problems began with not taking a full charge, then four (4) months later they were absolutely dead.  I even purchased a new battery charger to check if that was the issue -- it wasn't.  Message exchange with company (Sigma Power Systems / SPS) garnered the response of the warranty being only one (1) year.  No effort made to retain me as a customer i.e. extend even a slight discount to try their product again.  It makes me wonder if they know the result would be the same rapid failure.<br />My original batteries lasted eight (8) years; these should last at least five (5) years; but I got 1-1/2 years.  Scooter used indoors so not exposed to extrermes of cold/heat.  No drops or damage to the battery cases or the external battry box.  All connections secure, and batteries don't move within the box.  Used the charger that came with the scooter, and the second charger purchased was an identical 2A triple-protection UL listed dewvice connected to a surge protector on a standard interior home outlet connected to the standard breaker box for the apartment.  There have been no electrical issues.<br />Looking for long-lasting reliable batteries?  Look elsewhere.
Rating: 1 stars