Battery fits nicely for advanced controller of Hubsan H501S. So far I got 4 hours of operating time. Battery has super handy plastic cover for balance plug which helps with detaching from balance port and helps to secure the plug. I'm concerning trimming unnecessary plugs from battery after tests as I don't need them all (just JST and balance port).

Battery fits nicely for advanced controller of Hubsan H501S. So far I got 4 hours of operating time. Battery has super handy plastic cover for balance plug which helps with detaching from balance port and helps to secure the plug. I'm concerning trimming unnecessary plugs from battery after tests as I don't need them all (just JST and balance port).

Battery fits nicely for advanced controller of Hubsan H501S. So far I got 4 hours of operating time. Battery has super handy plastic cover for balance plug which helps with detaching from balance port and helps to secure the plug. I'm concerning trimming unnecessary plugs from battery after tests as I don't need them all (just JST and balance port).

I'm using it in my transmitter for H501S (advanced version). Keeps it up for at least 8 hours. Trimmed unnecessary cables so now it looks like a dedicated one :)

I'm using it in my transmitter for H501S (advanced version). Keeps it up for at least 8 hours. Trimmed unnecessary cables so now it looks like a dedicated one :)

I'm using it in my transmitter for H501S (advanced version). Keeps it up for at least 8 hours. Trimmed unnecessary cables so now it looks like a dedicated one :)