Gens Ace 2s LiPo Battery Pack 45C w/Deans Connector (7.4V/4000mAh)

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Gens Ace 2s LiPo Battery Pack 45C w/Deans Connector (7.4V/4000mAh)
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GensAce batteries have been proven within the Radio Control community to deliver reliable and consistent performance for all modelers alike. All GensAce batteries offer superior cell matching at the factory, and are extremely consistent in selecting matched cells after each and every batch produced. Additionally, low internal resistance (IR), offers modelers stable voltage output through the whole duration of the battery.

Additionally this Gens Ace Battery features Sub-C style "Bumps" on the bottom of the case to mimic the fit of NiMh batteries which are commonly found on touring car style chassis. However this battery can be used normally in a wide variety of vehicles which makes it extremely flexible with applications.



  • When used with Traxxas 2S applications, you may need the optional extended battery strap.
  •  When used with Traxxas 2S applications, you must install an adapter for the Traxxas High Current Connector (PTK-5228).
  • Some vehicles may require some re-balancing if the light weight of these batteries cause some handling changes. To get the vehicle to balance correctly, add some weight to the battery side of the vehicle.
Voltage: 7.4
Cell Count: 2S
Capacity: 4000mAh
Discharge: 45C
Dimensions: 136x47x24mm
Weight: 220g 

This product was added to our catalog on April 13, 2017

Tuesday, Jul 27 2021 (6 months ago)
Gens Ace 2s LiPo Battery Pack 45C w/Deans Connector (7.4V/4000mAh)
I currently have one of these installed on my TT-02 4WD drift chassis. Yes, I said Tamiya; this battery WILL fit TT-02 chassis and maybe some TA and TB chassis but you have to do your homework and carefully measure your chassis to ensure that this will fit.

As for the fit of this battery into my TT-02… This battery will fit snuggly into the battery side of the chassis and hold securely with the factory hold down plate. The ONLY problem you may encounter running this in a TT-02 is the much larger gauge main wiring and the addition of a balance plug, all of which needs to be considered when mounting this inside a TT-02. Also, this battery will only mount one way into the TT-02 and that’s with the plugs facing the front of the chassis as it’s the only way it’ll fit.

As for run time, this battery is AMAZING! I’ve run this battery for about two hours with the kit supplied Tamiya ESC and I haven’t experienced any issues. I have noticed a slight increase of power but it’s not much compared to a NiMH battery at full charge. Although Tamiya recommend NOT using LiPo, it will run on the TBLE-02S though I highly recommend the use of a LiPo alarm whenever you run this so you don’t accidentally ruin your battery or chassis.

Do keep in mind that if you plan to run this with a Tamiya kit ESC, you will either need to modify the battery plug to run a Deans or T-style plug end or use a Tamiya-to-Deans adapter. I prefer the latter since it offers a little more flexibility to use whatever battery I want without the risk of damaging my ESC by soldering a Deans end onto the battery wires.

Overall, it’s a great battery to use and if it weren’t for the unpredictable nature of Lithium batteries, LiPo in particular, this would be my primary go-to battery. Otherwise if you’re aware of the danger and need a spare battery to use, get this.
Verified Owner
Wednesday, Apr 14 2021 (9 months ago)
Gens Ace 2s LiPo Battery Pack 45C w/Deans Connector (7.4V/4000mAh)
It is not 136 mm long. It is 138 mm long. It is unable to fit in Tamiya rigs.