The 4000 2S Lipoly battery offers double the flight time as the stock DX8 or DX7s battery. This is a Li-Poly battery and must be charged with a Li-Poly charger. This battery will fit in your DX7s or DX8 with no modification and will enable you to fly for months without charging. No modification to your radio or the lipoly battery are required.
Great! Review by DBanks
Value
Quality
Service
I have not charged it yet, and it works great in my reciever! (Posted on 6/10/13)