All New from Reflex Racing is our 400mah LiHv battery.  This battery offers longer runtime, lower IR and overall better performance for longer races vs the 340mah pack all while only weighing an extra 2g. This battery is slightly bigger so, it will only fit your RX28 when using the 24mm battery conversion kits or the 102mm WB Chassis.  This battery will fit most AWDs car in the market as well as other cars that are capable of fitting a 24mm wide battery.
 
 
Why hardcase?  Well, hardcase batteries have numerous benefits.  Due to its design, a hardcase cuts down on connection points, uses more efficient plugs and thicker wire.  These 3 elements drop the internal resistance of the entire circuit leading to better overall current flow, less heat loss and more performance.  Couple that with the additional voltage capacity (these are safe to charge to 8.6v!) and the result is a sure fire winner.
 
The Benefit of having a battery that sits solidly in place on the chassis offers a handling advantage as there are no plugs and wires dangling inside the car.  (Just think, we use 0.9g mass damper weights to stability our cars.  Plugs and wires often represent more than this weight and they are jumping up and down inside the body of the car when using a soft case pack. ).  The result is a car that behaves more smoothly.  Additionally, hard case batteries simply wire better.  In categories like Pan Car, where wiring is a bit tricky to fit under the low slung bodies, the hard case bullet to battery system opens up a tremendous amount of space under the body. 
 
Lastly, hard case batteries are also safer and tougher.  Wires don't break at the exit of the shrink, so shorts are minimized and, the hard case also protects the cells from damage better, as well as isolates them from possible punctures or shorts caused by the chassis or impacts.
 
We recommend to charge the batteries at 1.0A
 
Dimensions:
44.5x24x12.5mm
 
Weight: 
19g
 
Includes:
1 battery pack
2 gold bullet plugs
 
You Can use Cable no:  RRE013 to charge.