SEEV 800 "Lazarus" battery procedure 

Did a number come with your scooter that you need to enter in the ap to get it to pair?

how much you paid?

I love it. It will indeed do 20 mph for 25 miles on a charge. Google SSR motor Sports and look for an SEEV-800.

If these scooters are stored and not charged every month or so the BMS in the battery pack will drain the pack down so low that the charger thinks it has failed and refuses to charge for your protection. I've used my scooter 16 miles a week now for months with no apparent long term damage to the pack.

I put 4 miles a day on mine 3 days a week. I charge on Sundays.