You have a nice stuffs. Protrak charger is very expensive in Japan.
The cost is over US$750 or so.
Talking about "Punch", I don't think 3 stage charging has "punch"
than Linear charging. I think both has punch if charging method is
You have a high-tech charger & some of high tech charger, like
Robitronic 3 stage charger also has temp. sensor to protect battery heat.
Heat may damage the battery a lot & loose the actual performance, includes "Punch", I believe.
So when you charge battery at 6A, I suspect the battery temp become really hot.
To reduce the temp. 3 stage charger is more preferred.
Because to adjust charging program is to reduce the heat.
Secondly, as you pointed out, capacity increase looks like no so important. I consider this way. If the battery capacity is increased,
the discharge capacity also is increased.
I don't know this is true or correct. (I will test it by using Fortless in the future.)
Discharging is pretty much related with "Punch", so I think
increasing capacity is also one of my important factors.
Most charger does not have temp. sensor, but definitely
temp. sensor provide battery more performance, because of
protecting excessive heat. This is a kinda advantage, because
battery provide more "punch" than heated up battery.
Currently, I am using 45 degree temp. cut setting as well as the setting which I told you yesterday.
Talking about charging time, you have to learn the charging time.
When you use linear charger and then charge 3300 battery at 4.5A, it takes 50 min to 55 min or so.
If you charge record breaker like following setting,charging time is
approx. 40 min.
from 1mAh to 1200mAh (Charged at 4.5A)
from 1200 mAh to 3500 mAh (Charged 8A)
from 3500 mAh to 4700 mAh (charge 3.5A)
*delta peak 24 mV
So, You need to get used to it by using three stage charger.
That means, if you change the setting, it also change the
charging time. However, if you keep in mind that 3300 battery at
4.5A charge takes about 50 to 55 min by linear charger,
you can caliculate when you should start charging battery, because 3300 battery at 4.5A charging is the most taking times
to charge the battery.
In other words, three stage charging is faster than that if you set
What do you think of my charging idea?
Originally posted by V12
Thanks for your explanation. Sounds interesting.
Iīm using the Protrak charger and this seems to be similar in some areas. With the newer versions there is a 3 phase charging possible also but mine are older versions (10.11 and 10.33). But from what I have heard the linear charge is more punchy than the 3 Phase. At least with the Protrak. Iīm using a 6A charge usually with all my batteries and a 0.04 - 0.06 delta peak voltage depending on temperature.
I always have my batteries discharged before (20A with the Protrak) and an additional equalizing on the Robitronic equalizing boards. Using this I charge about 4200 mAh. Without discharging/equalizing there is about 3700-3800 mAh charge.
But I think you canīt compare any mAh charge numbers with different chargers. I only race 27T and 17T motors so punch is the only important to me. Capacity isnīt very much interesting as we have 5 or 6 minutes heats and usually about 800-1000mAh are left after a run with new batteries.
Some guys here are using temperature detection in the 40-45° C range with the Protrak but Iīm not sure if this makes an advantage.
I havenīt tried it as my current version doesnīt have it but I think
there also may be problems with a 3 phase charge.
I try finishing the charging just before a heat for max. performance and with a constant 6 A charge itīs easy to know how long it takes. But with a 3 phase charge this may be difficult.
Another thing is if there is a delay in the timetable or youīre too late I try adjusting the charge current so itīs finished in time. This means I have to lower to 5A or even 4.5A or rise the current up to 7 or 7.5A. With a 3 phase charge I think this is impossible to adjust. What do you think?
Regarding updating the ROM this is also possible with the Protrak and I have done in the past.