2011 Grizzly 700 FI battery not charging

Ok folks, I need some help. I used my Griz to jump start my lawnmower at the deer lease and now my battery wont charge. I thought it was a bad battery so I had it tested and it checked good. I can recharge it and it will work fine for a few days and then it won’t start. The battery shows 10.4 volts when this happens. Sometimes the check engine light comes on but does not stay on constantly. Help…….

2011 Grizzly 700 FI battery not charging

Ok folks, I need some help. I used my Griz to jump start my lawnmower at the deer lease and now my battery wont charge. I thought it was a bad battery so I had it tested and it checked good. I can recharge it and it will work fine for a few days and then it won’t start. The battery shows 10.4 volts when this happens. Sometimes the check engine light comes on but does not stay on constantly. Help…….