Mtr(Mechanical Tracked Robot)

I use a 2.5A motor controller. No fancy ESCs in there. Looking at my research I believe LiPos will probably be the best, but I need one that fits the limited space I have, cause once that cover goes on there's hardly any room left.

This is what I use to power the EZ-B in my rover. I also use the same size lipo to power the motor and steering for the rover. Seems to work well for both.

It is about 3.8 X 6.4 X 1.59 cm

This one may be too big. It is a hard case Lipo that has a lot more capacity.

Dimensions about 13.3 X 4.1 X 2 cm.

If you can help me find the charger for cheap the 1600MAH's will be the batteries! The hard case is too big.

This is what I have and it works great, but at $90 may not be what you consider "cheap."

https://www.ebay.com/itm/Duratrax-Onyx-235-AC-DC-Balancing-Charger-LiPo-LiFe-NiMH-NiCd-Brand-New-DTXP4235-/181616596593?pt=Radio_Control_Parts_Accessories&hash=item2a49315671

Here is a versatile charger for $45. I don’t know much about them. You can often get discounts from Hobby king if you put the item in your cart and wait a minute or two. This is where I buy my turnigy batteries which have worked very well.

https://www.hobbyking.com/hobbyking/store/__30917__IMAX_B6_AC_Charger_Discharger_1_6_Cells_GENUINE_US_Warehouse_.html

You can get a clone (fake) of the same unit for less. I have just read, though, that quality may not be as good as the genuine one.

Here’s a clone for less than $22 shipped. You would need a 11-18 volt wall wart).

https://www.ebay.com/itm/130935654729

A dual power clone (no need for wall wart) for $32 shipped.

https://www.ebay.com/itm/iMAX-B6-AC-B6AC-Lipo-NiMH-3S-RC-Battery-Balance-Charger-Adapter-Blue-US-STOCK-/141052565774?pt=Radio_Control_Parts_Accessories&hash=item20d763590e

For Lipo batteries, search the Hobby King site. they have lots of choices and maybe you can find the perfect size. The 1600 mAH worked for me size wise. I think you will be looking for a 2S (7.4 volt). Also it is bit easier if they are in the US Warehouse.