We are often asked which batteries are really the best for XMODs, Mini-Zs, and the rest of the 1:24-1:28 scene. So in pursuit of answering that question accurately, we invested in the appropriate testing equipment and analyzed a variety of the popular batteries on the market and here is the resulting comparison data.

In 2006 we did a similar test including several Ni-MH batteries popular at the time. Click here for those results.

Testing Procedures: A CBA II Computerized Battery Analyzer was used to perform these tests. We used a 2 amp load this time which is closer to the average load that batteries will see over the course of a typical race in both XMODs and Mini-Zs. Our cut-off voltage was set at 3.6V. All batteries were peak charged with a Duratrax Ice Charger at .7 amps. It should be noted that different cells will peak at different voltages as shown by the test results. Each pack of 4 cells was discharged and charged twice, with the best curve being plotted.

Rated Capacity: 750 mAh Tested Capacity: 640 mAh Total Time 19:11
Perennially the Mini-Z enthusiasts' favorite, the Intellect cell provides tremendous results with the highest sustained voltage over the discharge, making it perfect for stock classes and all-out speed runs.

Rated Capacity: 900 mAh Tested Capacity: 570 mAh Total Time 17:09
These cells have become popular since Kyosho took over Team Orion. The curve is very similar to the Intellects. While we've tested some in the past that outperformed the Intellect in capacity, our sample pack fell slightly short of the leader.

Rated Capacity: 1100 mAh Tested Capacity: 760 mAh Total Time 22:39
Team Orion's other offering promises a great runtime. But does it deliver? Our sample pack offered the best combination of runtime and voltage over the discharge curve.

Rated Capacity: 1000 mAh Tested Capacity: 610 mAh Total Time 18:12
These BetterPower cells are hard-to-find in large volumes, but have still managed to gain popularity in many of the RC forums. Our sample pack's voltage ran neck-and-neck with the Team Orion RT, but then dumped far short of the Orion RT.

Rated Capacity: 950 mAh Tested Capacity: 800 mAh Total Time 23:56
The GP 850's were not available at the time of our test, so we arranged for a 950 mAH sample. The 950 had the longest runtime in our test, although voltage left a little to be desired. We would still like to test the 850. If you know where we can find them, drop us a line.

Rated Capacity: 800 mAh Tested Capacity: 380 mAh Total Time 11:21
It took buying a couple of packs to find 4 cells that would take a charge. We've had a couple of clubs mention that "everybody" runs these. "Everybody" is missing out based on our test.

Rated Capacity: 1000 mAh Tested Capacity: 620 mAh Total Time 18:32
Average voltage was terrible, but runtime wasn't bad. I know I'm sretching to find a redeeming quality here. I guess if you are a beginner, these are the cells for you.

Rated current is not a reliable indicator of performance. Most manufacturers discharge their batteries at .2C to determine the advertised capacity which explains the giant discrepancies in rated vs actual capacity. A stock car will pull up to 3 amps while a modified car can pull up to 8 amps of current.

It should be noted that Ni-MH cells can vary cell to cell. These tests should not be misconstrued as absolute. For example, a different set of four Team Orion RT cells may outperform the venerable Intellects. But our sample pack did not.

Furthermore, running lab tests is not 100% indicative of performance at the track since there is no test (that we're aware of) with a variable discharge rate to simulate racing conditions.