How long is too long to leave the battery on a raptor 90 on charge? Using a jump box. Trying to fix no start issue. Didn’t start after 15 minutes on charge.

 

if its is the type of jump box im thinking they are not a charger they just supply enough voltage to get things started.. If it did not start after 15 min then your box is low on charge/bad or battery bad or you have issues else ware... My jump box will start heavy equipment in less than 5 min on a little batt like the one in your atv you should be able to turn over and start instantly