Fargo Fire says a charging ebike battery caused a fire inside an apartment Tuesday afternoon.

The fire was reported just after 2 at an apartment at 1781 35th Street South, just east of I-29. The building’s sprinkler system activated and put the fire out. Fire damage was limited, but the unit has smoke and water damage as well.

The Fire Department says the ebike had a modified battery, and the owner left it unattended during charging.

People are encouraged to buy their ebikes from a reputable supplier, and not to modify the battery with aftermarket parts.