MWX 350mah hard case battery (MX-SB-350)

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$10.00
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Product Overview

MWX Performance High-Performance Hard Case Batteries Power your race cars with uncompromising reliability and performance. The MWX Performance battery delivers a true 350mAh capacity at 7.4V, ensuring consistent energy output. With a 60C burst rate, it provides rapid, high-powered delivery when you need it most. High burst rate is what allows you to discharge at very high rates up to 10a!

Crafted with pure LCO material and zero magnesium filler, these batteries eliminate instability, swelling, and premature wear—common issues caused by magnesium. The result? Longer-lasting power, enhanced safety, and maximum efficiency for all your demanding applications.

Upgrade to MWX Performance—because when it comes to power, compromise isn’t an option.

  • Super high performance,
  • Lowest IR per size in the market,(15-18per cell in race conditions , preparation and proper equipment)
  • our batteries are rated at the legal voltage of 8.4
  • 3 birdcage bullets included
  • 13x19.8x45
  • 17.2g
  • high flow bullets are available
  • R1 adaptors are available

Break in procedure

  1. place battery in heater around 38-42* for 10 min
  2. remove from heat and do a 4a discharge/2.2a charge cycle
  3. allow to cool off for 5 minutes
  4. place batteries back in heat and do two back to back cycles and then hit the track!
  5. you will find that these batteries get stronger as time goes on.

DIY charge cable kit

Reviews

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  • 5
    350 small block battery

    Posted by Jim Cukla on 7th Dec 2025

    These batteries are what I was always used to: Hard Case Lipo! They should be great for our club races of 5 minutes-8 minutes. Check out MWX's video on these and the big blocks. You will see how Marcus puts a lot of thought toward eing the best!