It's the same spec as the one I have. It performed better than everything else I own run at 40 amps discharge on my old 406DUO. I sold that charger and am now limited to testing at 32 amps discharge on my DX6. I will cycle the CRC at 1C a few times then cycle at my normal rates (32 discharge and 15 charge) as well as run a couple of other batteries through the same cycle and let you know what I see at 32 amps.

How do you get the ir value on a 1s pack?
My MD8 charger doesn't tell me, maybe I need different wiring?

These chargers read precise voltage and IR via balance ports, so you値l need a 1S cable with a balance connection. Alternatively, re-pin a 2S cable by removing the center pin, and replacing it with the right pin.

If you have a 2s charge lead and an Icharger you can use this adapter to charge 1s batteries without having to rewire.

https://tqwire.com/shop/rc-products/...for-ichargers/

OK, thanks, but what is the correct pin?

You will want to remove pin two, remove pin three, and place pin three in pin two's slot. (JST HX balance connector pins are numbered consecutively from left to right.)

The new CRC battery performed well. Here are the numbers compared to a season-old (40-ish cycles) SMC 8,000. Again, this is one of the original 1S packs (AKA 1st batch):

Time CRC 7,500 SMC 8,000
1-minute: 4.076V 4.057V
2-minutes: 4.007V 3.996V
3-minutes: 3.937V 3.934V
4-minutes: 3.873V 3.867V
6-minutes: 3.787V 3.781V
8-minutes: 3.728V 3.719V

Can you get internal resistance numbers at each minute? That would likely tell a better story.

I used the Junsi console to capture the data. It does not capture IR. I can run them again and just keep an eye on IR reading. The only caveat is the IR reading only updates periodically on the iCharger.
Results...
CRC 7,500 SMC 8,000
1 min 2.0 1.2
2 min .9 1.2
3 min .9 1.2
4 min .9 1.2
5 min .9 1.2
6 min .9 1.1
7 min .9 1.2
8 min .8 1.1

Those numbers look pretty dang good. I wonder how the CRC battery will measure up a few months of racing? A few locals here have told me the CRC batteries can have a tendency to puff, but nobody has the new 150C 7500mAh cell.

I was keeping an eye on IR and voltage with my Protek 8800 LiHV this weekend, and charging to 4.20V @20A, IR floated right around 2.2 when the battery got hot. The track was a lot more technically demanding, and the battery was not the limiting factor, but the twisty infield definitely had me noticing falloff a bit more than I'm used to. The battery is also 4mm bullets, which means I need to bring a separate charge cable for it... So in light of that, I have the CRC and EAM batteries on order. I'll eventually sell one off and keep two of the same as I have aspirations of jumping into 13.5 next season(potentially).

I am stating the obvious here, but the lower IR CRC pack is going to have more punch all run long. I find that the SMC packs held on pretty well for two seasons, then got moved to my beginner son's car. They still work and not really puffed, but won't compete for top of the A anymore. Was kind of surprised that the SMC 8000 pack didn't have increased IR later in the run. So, likely that it is still a decent pack, just not top level anymore.

I got the CRC SHO 7500 150C and EAM Graph-X 7500 130C batteries this week. Did 4 easy “break in” cycles of 1C charge and 2C discharge on them before running them. Compared to the Protek… holy cow! I feel a bit more punch earlier in the run but the end of the run is where they really made a difference(as expected). I think either one is an excellent choice.

The CRC battery is definitely the better of the two. It has noticeably more punch out of corners and seemed to remain most powerful of the three at the 8 minute mark. After a few cycles, IR on my Toolkitrc charger was reading 0.4-0.6 ohm. At the end of 8 minutes, I wasn’t having to push the car to 10/10ths to keep my lap times consistent. The EAM battery was roughly the same effect, just not as magnified. IR was reading 0.9-1.1 ohm and, compared to the CRC, I definitely had to push the car harder at the end of a session to keep lap times low. This is not unexpected as the C rating is lower and IR was higher. I did try charging at 30A to help with that and IR did drop to 0.8, FWIW.

One thing of note: the quality of the case fitment on the EAM was a bit better. Not enough to justify the extra $$$ though. The CRC is killer for the money, I’ll also be curious to see how these are both doing in a month or two.

All of this to say battery expected to do better did do better.

SMC 8000Mah

I知 not sure if they値l be coming out with a replacement soon or if they値l only be temporarily discontinued, but $34.95 for the SMC pack seems too good to pass up. Snagged a couple yesterday.

Those packs are very good! you won't be disapointed

Is it worth running a fan for a spec motor class?