Looking for the best balance of range and sag for 10s1p/12s1p cruising

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Hi everyone,
I’m planning a battery swap for my two boards (a 10s1p and a 12s1p setup). My riding style is pretty chill: mostly light cruising at 20km/h (12mph) with occasional bursts up to 35-40km/h (22-25mph), running on 80-100mm wheels.

A range of 10-12km (6-7 miles) is enough for my needs, but if I can squeeze a few extra kilometers/miles out of the pack, that would be even better. No hill climbing, except for the occasional small parking garage ramp. I weigh 73 Kg/160 lbs.

From what I’ve gathered, the EVE 40PL is one of the most solid alternatives to Molicel right now. It’s a 4000mAh cell whose internal resistance is impressively low, which should significantly minimize voltage sag during acceleration—a crucial factor for my 1p configurations.
On the other hand, in a 12s1p configuration:
EVE 40PL (4000mAh):44.4V x 4.0Ah = 177.6 Wh
Molicel P45B (4500mAh):44.4V x 4.5Ah = 199.8 Wh
And this is where things start getting a bit too technical for me.

Do you experts have any other recommendations or thoughts on this choice? Is there a better balance between range and sag for a 1p build?

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Bak45D

Reliance RS50

Ampace jP50

Tenpower 50XG

Eve 50PL

I have a EVE 40PL 10S1P rig with 105mm urethane hub motors, and it easily went Ten miles at the speeds you stated under @trancejunkie feet, but i wish it were made with any of the above cells instead.

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I used 0.2mm copper under 0.1mm stainless on my EVE40PL 10S1P.

TranceJunkie is about 15lbs more than you, but we were rolling in Flat Florida.

Any of the cells listed above, except BAK45D, will sag even less than the EVE40PL.

The 40pl might have a second or 3 where it sags less at 40 amps.

Nominal voktage is generally used for determining a pack’s watt hours

The Reliance RS40 performs very similarly to eve 40pl.

A hub motor 10s1p is only going to draw 25 amps and it would be impossible to tell the difference between the 5.0 amp tabless powerhouses.

Technucalky the TEnpower 50XG sags the least and stays the coolest at 40 amps, but by a small amount

@DIY500AMP.COM will likely have them in UPS’s hands by the afternoon

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Thanks for the suggestions! Looking at the specs, the Ampace JP50 seems to be the clear winner on paper— 5000mAh capacity while maintaining an incredibly low internal resistance (comparable to the EVE 40PL), which is perfect for my 1p sag concerns.

However, before I pull the trigger, I’d like to dig a bit deeper: do the other cells mentioned (BAK 45D, Reliance RS50, Tenpower 50XG) have any other advantages that I might be overlooking?
I’m thinking about things like:cycle life, thermal stability, real-world reliability. Are any of these known for being ‘sturdier’ or more consistent in quality control?

I’d love to hear your thoughts on whether the Ampace is truly the best all-rounder or if one of the others has a hidden edge for a daily cruiser.

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The Ampace JP50p1 is not head and shoulders above the other 5.0 Ah cells.

There is some of Mooch’s data I can’t share, but IR is not the end all be all of performance, as it depends on the state of charge of the cell, and whether it is measured in AC or DC.

Mooch’s Patreon is only 2$ a month and will give you a flood of information, knowledge and insight

The preproduction EVE 50PL, on paper, was not supposed to outperform the 40PL sag wise, based on IR, but it does.

Cycle life is largely still unknown.

Pajda on Endless sphere forums has some cycle life testing which, so far, shows the RS50 behaving extremely well, better than the Molicel P50B.

If I were to choose any of the cells I mentioned purely based on performance when new, I would choose the Tenpower 50XG, as it runs the coolest.

I have a 10s2P BAK 45D (A04) which is performing extremely well being cycled twice a day since June 1 2025. It does not approach becoming too hot in my use( in Florida,even in summer), and is not the coolest running tabless cell.

Discharging down to 3.2 or 3.0 it is very close to the 5.0 amp cells in delivered amp hours.

Tenpower has some impressive claims as to cycle life, but when comparing the datasheets as to cycle life, there is no standard as to charge discharge rate to compare the cells. The number of cycles is only guaranteed minimums and not really representative of how they will retain their capacity in actual use when they are not discharged to 2.5 volts each time.

Mooch often states that the differences in these 5.0Ah tabless cells performance ( when new) is so slight, that they will only show up when bench testing with precision instruments, and never be able to be noticed in actual use.

I personally would choose any of the 5.0 ah cells based on price, and what Nelvick has in stock.

He has imported most all of these cells ASAP, often paying a steep price for Air Shipping, and then quickly sends them off to Mooch( often overnight shipping) on his own Dime, and we all have benefitted from this.

He is also a very honest and forthright dude, and I want to support him, and his store.

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Which store does Nelvick run?

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@MichaelWA if you any question, feel free on contact me. nelvick@diy500amp.com

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I already know the website. I just didn’t know the person who run it. :joy:

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