2 cell racing has some benefits and 1 cell has detriments.
I cast above 2 cel benefits. Here I state detriments of 1 cell.
But I well know not only 1 cell has benefit but also I agree with no more category.
1. miss charge
This year JMRCA race separated 1 cell open and 2 cell stock 21.5.
Before then allowed to run both class. This is same as local track race.
In the case, I watched sometimes Lipo battery explosion because racer charged 1 cell battery by 2 cell setting. This was not once.
Recent race have a wide variety of category including 1 cell and 2 cell on a day. But racers may use same charger by cell setting every times. When you attend 2 category Q3F1 race, it requires seven times changes. If it forget once, what happen? Most cases will find out before explosion. But rare case is not.
Racer who use same charger or if 2 cell only allowed, will prevent from those mistake.
2. balancing
As you know, most 1 cell battery for 12th is 1S2P. Each cell lie on above and below in battery case. Racer use always it same direction because battery terminal is one side. Therefore, each cell dose not equal to get worse by heat problem. Upper cell cooling by air during run, but other cell sandwiched by between upper cell and carbon chassis. This effect gets damage cell. I have dismantled 1 cell battery over 10 packs so far and check each cell balance. Without exception, though not many sample, below cell had damaged.
If 1 cell is made of 1 Pack, cell balance is not problem.
How do you think again?
Thank you for your opinion.