@nicolasLGM, would you open one of these 8Ah batteries and tell us which 21700 cell reference you find inside and confirm the Serial / Parallel structure as well ?
It is interesting to compare the battery + charger combo price in € accross Europe:
Lidl site
8Ah Battery price
1x12A BT Charger price
Total
.fr
42
55
97
.de
50
40
90
.be
50
35
85
.nl
70
45
115
Battery from France + charger from Belgium is the best option (75€)
The old battery charger 2x4.5A is another cheap possibily
I had a small leak in my box , it damaged one cell , I opened the battery to check, and remove the damaged cell. Can I replace this damaged cell by a 21700 Samsung 40t 4000mah ( very close from the lidl cell) ?
You have to find a cell with identical or higher Max. Continuous Discharge Current.
The Molicel P42A 4000mA with 45A MCDC might be too good for the job
Not sure what happens if their power discharge capacity doesn’t match that of the group cells they are inserted in.
A huge and heavy home-made 16Ah Parkside battery (April 2023):
Packs like that might work, but I think it’s risky because they are off brand knockoffs and you have no idea what cells are in there and what those cells are actually capable of. There are some tool packs out there that do have good quality cells if you research the topic. Some YouTube channels do pack tear down videos. I know harbor freight had nice Samsung cells in some of their tool packs a while ago but they may have switched. Good quality cells just cost more, building your own pack usually ends up costing less
Hello Nicolas, here in Italy this week we have the 20v on sale. Do you think is enough 2x4ah to build a foil drive slim system? I want only to catch more waves and help to go out from the beach. Now i have a flipsky 6374 motor. Thanks
Hi !! I am going in circles reading forum responses and I am excited and lost at the same time. I have a foil drive gen 1 and looking to either make one or buy a battery replacement for a fraction of the cost of a new one from the manufacturer. Do you have a few links to batteries ready to go or a step by step outline on how to make one??? thank you very much for your help ! Branden
@Brando
Maytech have a battery that seems similar, you may have to check the dimensions if using the original box.
The Turnigy batteries, plus buying a Hota D6 Pro to charge, at 6s and running in series is an easy option for a custom build.
The FD Assist Plus batteries and the Maytech are lithium ion, and in my experience not as good as lipo.
I also question the 12.6 ah of the FD batteries based on running them in series with a 12 ah lipo battery.
There are two types of people here, the builders and the constructors. The builders have time, equipment and skills creating their builds, and the constructors are like me and do simple designs that just do the job attaching random stuff off the shelf together that sometimes works.
I had a Assist plus and it wasn’t the best for my needs and was going to sell it to get a Max, but the electronics died, so I started my construction just replacing the electronics.
But a few builds failed and I improved it each time for more power, and my path to experimenting and likely more failed future builds has begun.
