A12s pack will be around 34kg😱
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What’s the quantity?
Hi. Less than ten. For 2 efoiler!?
Is this still possible to purchase?
How does this battery work out?
All ok?, any issues?
So I’m stuck on the battery (going with flipsky 100kV motor from the discussion over at New Direct Drive Inrunner 65150 - #278 by theone - Propulsion System (Motor, Gears) - FOIL.zone) and I’ve spend a few days emailing back and forth with a few companies but shipping is killing me as its only 1 piece I need via Air to Ireland- what you gonna do eh? So putting that aside, I’ve found the below:
This product is no longer available.
So me not being a battery expert or having built one of these efoils before, I want to check that I’m all ok with you guys before I place the order:
I’ve been quoted the below:
$240 per unit
13S12P - 48V 36ah
IP67 Box - 335177145mm
BMS
Charger (additional $15)
18650 Batteries (type tbc)
11.5kg (why so heavy? but they say they can not do lighter 
)
Max Discharge of 72A - possibly they are being conservative here
Continuous set at 36A (can be changed on the BMS?)
2 year warranty
Shipping Cost… $130 
Thats all in $385 which is roughly €345 and they accept Paypal (big plus for me)
So I’ve asked them to hold the price for me until the end of the month so I can iron out any details which may arise here. All been very helpful so far from them so hopefully that continues. They said if I can get a few people interested they maybe able to offer me a slight discount so if ye wouldn’t mind passing me details and I’ll put you in touch directly with them
Can all you lovely people please rip this apart and let me know what you think and if it all stacks up or not?!?
Yup - I had to go away and do some more thanking - see my latest post. Also went away and decided I know nothing about batteries and to stop sending links without understanding a bit more. sorry and thanks for the feedback!
I would not count on the IP67 thing, looks more splashproof than waterproof to me, but I could be wrong…just the usual skepticism by looking at the connectors.
This might be enough, depending on your weight and your components (If you are around 60kg and have a build optimized for efficiency).
Still since this might be a prototype build and maybe your friends will try it as well, I would go for much higher continuous discharge.
Also since this is a prebuild battery and might be pottet/glued in plastic (to assure the IP67), you might not be able to do any modification. So no new/higher BMS, no other connectors usw.
My recommendation: Look for a complete battery with at least 80A continuous.
Skip the IP67 part in your search, so you can change connectors without worries and you will have to put it in a waterproof box anyway.
Also I think this battery is quite tall, your hatch wont be higher than 100mm…
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Hey Tim. If you referring to the Vruzend assembly kit I wouldn’t go near it. In theory it looks like a good compromise however the quality is very poor. The connecting strips have burs on all the holes which require grinding off in order to double up on the thickness. The threaded lugs are random lengths again making it hard and sometimes impossible to get the nut on when using two or more strips. Invest in a quality spot welder, you wont regret it. Kweld make an great one that works off a lipo battery, very compact and neat.
https://www.keenlab.de/index.php/product-category/kspot-welder-kit/
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So I’ve been back in touch with them and the price has increased to:
$296 + $15 for Charger + $130 Delivery (to Ireland) = $427 ~ €385
This takes into account the increased BMS and change in cell type to 80Ah continuous and we have re-configured the battery (13S18P) height to be roughly 70mm.
I know 13S18P = 2000mAh batteries but at the price for the whole kit - if we can live with the weight - is it now a more attractive battery solution? Or are there still issues with it?
He also says he can offer 2200mAh cells for the same price so getting an extra kick there to 39600mAh or else reduce the battery weight by 1.17kg
I know the battery is probably only splash proof (I don’t mind as I’ll have it in a sealed compartment in the board) but I’ve yet to see an alternative that is cost comparable inc. BMS and charger which removes the need for spot welding and comes with a 2 year guarantee.
Thogughts from all Welcome
My biggest concern wouldn’t be the specs, it’d be trusting a random supplier from Alibaba to deliver what they promise. That particular supplier doesn’t appear to have much of a history on Alibaba either.
If I were you I’d try to find someone on here who can make you a battery if you have the cells shipped to them. Or I’d try to find a premade eBike or eSkate battery (they’re often 12S or 14S) and just run a couple of those in parallel.
I’d suggest asking what cells he is using in the battery. 13S18P will be VERY heavy. I’m using a 12S12P and it weighs ±8Kg.
I’m quoted at 11.5kg for the battery - me being 80-82kg (depending on what time of day or mood you get me in!) I’m worried about overall weight.
I asked what cells he is using and he provided me a link to his manufacturing facility so seems to be own brand chinese manufactuer 2000mAh - see below pic
That’s the problem with using cells that are worse quality. With Samsung 30Q (14S12P) cells you could get a battery that weighs in at around 7.5-8kg which makes quite a big difference when carrying the board and it would have the same amount of run time.
Thanks for the heads up!
Not looking for any more headaches in a project that has already had many
Ya I’m worried about the weight alright but I think the price may be too good to turn down on my first board build. Is the main concern the weight for carrying around (distance from car to water etc.) or the weight to get to foil?
Flipsky motor.
If its carry about then I may live with it for my first board
I find cutting weight wherever you can is worth it.
My first board with small battery weighed in at around 15kg. My newer board is around 21kg with a heavier battery and I definitely feel the difference.
Now I’m on a mission to go as small as I can so it’s easy to transport and foil better.
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Hi ,
Following this thread with great interest…
The assembly of an own pack seems a bit risky with my limited knowledge.
Maytech has a battery solution as well I noticed…:
12s12p 36ah Samsung 30Q battery pack with 150A BMS
They offer it for $1200 and with a 5A charger for $40
what are your thoughts on this offer?
As someone who also doesn’t feel comfortable building a battery, I’d say that’s a pretty fair price (assuming the shipping rate is also fair and the batteries are genuine Samsung 30Q).
For reference, a similar battery from one of the established companies (Lift, Fliteboard) is over $3,000. Theirs are about 10% higher capacity, but that doesn’t justify a 200% price increase.
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