This is the 7s2P enclosure which came with my sub 300$ Junkking kicktail in October 2023.
Its 7S2P double stack battery is made with 2000 mAh cells of an unknown brand and CDR. No doubt junk.
It claims 103.7 watt hours.
The 7S ESC which came in this enclosure had dangerously horrible brakes that threw me a few times, when I was running it on the Diagonal Mini with its 70mm hub motors.
I removed the stock thin aluminum plate ESC heatsink it came with, and installed a larger much thicker one, and then attached the deep finned heatsink to that.
Onto this heatsink I installed a voltage booster rated at 10 amps input current, but that has a 15 amp fuse. I have pushed it as high as 350 watts output, charging my 10S esk8 battery from 7S, but 250 watts is more realistic without a fan blowing over the finned heatsink.
While I made this portable charger functional a few months ago, Before today, I brought it only once with me to portable charge, but basically have not needed the extra range so have not really used it.
I likely did not need it today, but I brought it, so I used it, and explored further afield than ever before from home base.
The Second park we visited, I busted it out, but My esk8 battery only needed 170 watts to reach the constant voltage stage, so charging watts were just tapering right from plug in. I let them taper to 100 and packed it back up. It fits nicely with the wattmeter and connectors inside this little bag which came with a cheap backpack.
I am going to dedicate an inline wattmeter with an XT60 direct to the Charger’s output and a 5.5x2.5 to the Charge port on Esk8 over 12 and 16awg. This wattmeter above is one of my two best, but the far Anderson powerpole is attached to a 5.5x2.1 barrel connector which still fits a 2.5mm pin, but which came with thin 20 awg, maybee even 22 awg from a 7S 40 watt charger.
This wire was getting hot and slowing down the charging potential.
We rolled to a new to us spot, and had this little beach between Million dollar mansions with their own private beaches, all to ourselves.
The road to this spot has a sidewalk but I was getting on the smoother 40 MPH road after a line of cars passed and full throttling upto ~25mph for as long as I could until more traffic approached behind me and I braked and returned to sidewalk and let them pass. Was feeling a bit sketched out going 25mph on an unfamiliar road surface.
Fiona absolutely loves to play ball on the beach, even more so, to swim after it.
She was not acting like a 12 year old, her goofy inner puppy re surfaced and she was all reinvigorated barking at pelicans and prancing around like she did at half her current age.
Great to see!
After she eventually got tired, We walked and rolled to explore a few more miles but did not find another spot to chill out that was nearly as pleasing.
So we rolled back to the same park where we had charged at 170ish initial watts. The speed limit on the narrow road is 40mph and the sidewalk is kind of rough with deep soft sandy sections in the shade so hard to see. There was a lot of traffic, and I was a bit annoyed at how many decided to match my sidewalk speed and start taking video of Fiona in her chariot, while cars behind them got impatient, all too ready to cross the double yellow to pass.
When we got to the park, this time, the Esk8 battery was low enough that it accepted the full 250 watts from the portable charger, until the 7s2P LVD kicked in. It got the 10S Esk8 battery back upto 39.4 volts while we just chilled out and barked at pelicans.
Its only about 2.5 miles home from here, but It was nice to have a lot of battery left, so we took the extra long route, with a lot of full throttling top speed runs, to hit the 4th park of the day, and nearly double that distance.
Not sure of the total mileage on this outing, as the trip odometer resets when the ESC shuts itself off, and I did not keep track, but it is likely our longest journey yet at 13-14 miles, and we returned to 35.9 volts on the remote but which measured 36.26v on the bench via the wattmeter.
We are definitely going to roll to the little beach far more often from here on out, especially on the low wind days with an incoming clean green tide. I could likely make it here and back without the portable charger, But it is nice to have that extra throttle and torque and potential range.
When this enclosure was on the Diagonal Mini, I used to strap a a 57wh 7S1P battery to the deck, plug it into the charge port have ~ 50% more range. So in theory can do the same and boost the 103.4 watt hours to ~160 I have a high rpm 50MM fan that can run on 29.4v safely which I can plug into the charge port of the 7S1P battery and blow over the heatsink, and can likely safely dial the booster upto 350 watts, maybe even higher.
I could make a new 7S2P from Eve 35V and have 176 watt hours inside the enclosure instead of the 103.7wh it has now, But that is not needed at this time. If it really came down to it I have lots of power tool batteries which can power a Voltage booster and charge where ever I go.
I have my Old 10S2P DMEGC-26E that was rated at 187 watt hours when new, I could strap to the deck and plug directly into my parallel ESC feed and not even need to bother with a portable charger. I have not yet needed such range, but I have also felt a bit constrained not really knowing where I should declare a half way point and turn around.
With the 250+ watt portable charging at the half way point, it is nice leaving with full available torque, and more than enough to get home, and not have to baby the throttle.
