Kent Torpedo Battery Replacement

[chuyskywalker]

I picked up a Kent Torpedo ($150 on sale!) from Walmart a while back and my kids been having a blast on it, but we keep running out of juice, curses! I need help finding a compatible battery case I can build a new pack in.



It looks like the battery is a 7s2p in their "bottle case" style setup. Kent does sell a spare/replacement, but holy smokes Batman, $200 is WAY over priced for 14 x 2600mah cells and a teeny bms. I've got a dozen or so battery builds under my belt and plenty of good 18650's around to throw at this, but I can't for the life of me find a suitable empty case anywhere I look.

I've scoured Aliexpress pretty good finding things like the "cuttle" battery case, a few similar all-in-the-bottle kits (but in 36v), and even a 2170 variant of this style.

But for the life of me, can't find the "mini" 7s2p version of this with the 4 prong connector on the base of this particular brand. I would really prefer to not hack-job in something else at this point (nor do I want to spend $200+ dollars to fully swap out to a 36v system with similar bottle setups). Just a second battery.

Just putting a line out there to see if anybody might have a better sluething sense on how to source these.

(Very high chance I'll also rebuild the stock battery -- using 2600mah cells? Come on, those are rookie numbers!)

 

[LewTwo]

Is this it ????


https://www.alibaba.com/product-detail/small-capacity-Water-Bottle-case-36V_62040494474.html?

Of course at $132 (plus shipping) it costs more than you paid for the bike.

 

[chuyskywalker]

Is this it ????

That style (the "DC-1C") is the same over all shape, but all of the ones I've come across have an incompatible base plate (2 pins instead of 4).

 

[E-HP]

Is this it ????

That style (the "DC-1C") is the same over all shape, but all of the ones I've come across have an incompatible base plate (2 pins instead of 4).

Why aren't you just rebuilding the existing pack? You could buy a second bike for spare parts; cheaper than the battery.

 

[chuyskywalker]

Why aren't you just rebuilding the existing pack?

(Very high chance I'll also rebuild the stock battery -- using 2600mah cells? Come on, those are rookie numbers!)

You could buy a second bike for spare parts; cheaper than the battery.

The $150 price was a rock bottom, inventory clearing flash sale type deal. It's not available any more.

 

[tipzylidz]

I picked up a Kent Torpedo ($150 on sale!) from Walmart a while back and my kids been having a blast on it, but we keep running out of juice, curses! I need help finding a compatible battery case I can build a new pack in.

View attachment 324174

It looks like the battery is a 7s2p in their "bottle case" style setup. Kent does sell a spare/replacement, but holy smokes Batman, $200 is WAY over priced for 14 x 2600mah cells and a teeny bms. I've got a dozen or so battery builds under my belt and plenty of good 18650's around to throw at this, but I can't for the life of me find a suitable empty case anywhere I look.

I've scoured Aliexpress pretty good finding things like the "cuttle" battery case, a few similar all-in-the-bottle kits (but in 36v), and even a 2170 variant of this style.

But for the life of me, can't find the "mini" 7s2p version of this with the 4 prong connector on the base of this particular brand. I would really prefer to not hack-job in something else at this point (nor do I want to spend $200+ dollars to fully swap out to a 36v system with similar bottle setups). Just a second battery.

Just putting a line out there to see if anybody might have a better sluething sense on how to source these.

(Very high chance I'll also rebuild the stock battery -- using 2600mah cells? Come on, those are rookie numbers!)

Did you rebuild the battery? My daughter has the same bike and loves it but dies 2 quick. Wondering if you were able to find a solution?

 

[chuyskywalker]

Did you rebuild the battery? My daughter has the same bike and loves it but dies 2 quick. Wondering if you were able to find a solution?

I did not; I found a guy who was (for some reason) selling the stock batteries so I just grabbed a second one. Never even opened one of the cases. Also never found the same body-style as just a case to build in.

 

[jmbennett29]

I would love to buy some of these. Can you help me with were you found this guy?

 

[chuyskywalker]

I would love to buy some of these. Can you help me with were you found this guy?

Was just a dude on offerup -- ad's long gone, sorry.

 

[Romi]

Can I build one without stock enclosure?

 

[Chalo]

Can I build one without stock enclosure?

Yes. Use compatible voltage, have enough current capacity to meet the controller's maximum demand, and attach to the heavy gauge red and black leads to the controller.

24V 9.6ah 245.8wh K2 Lifepo4 Battery w/ BMS K2B24V10EB

Here are K2 24v Lifepo4 batteries with a quality bms. Model K2B24V10EB. They were removed in working condition from hospital computer carts. This is a well built, unique battery. It's rare to find a compact 24v lifepo4 power module. These batteries have not been capacity tested but every battery...

batteryhookup.com

 

[E-HP]

Yes. Use compatible voltage, have enough current capacity to meet the controller's maximum demand, and attach to the heavy gauge red and black leads to the controller.

24V 9.6ah 245.8wh K2 Lifepo4 Battery w/ BMS K2B24V10EB

Here are K2 24v Lifepo4 batteries with a quality bms. Model K2B24V10EB. They were removed in working condition from hospital computer carts. This is a well built, unique battery. It's rare to find a compact 24v lifepo4 power module. These batteries have not been capacity tested but every battery...

batteryhookup.com

That's a good price. Does Battery Hookup ever stock larger Lifepo4 packs? I'm looking at 12V 100Ah packs to start building up my backyard solar to also accommodate backup power for my house (extension cords, not connecting to my house wiring) as well as charging my bike. Looks like 5 of these would provide a similar stored energy capacity of a 12V 100Ah, for about $100 less. Ideally I want to expand up the 12V 200Ah (2400 Wh), which should allow me to avoid firing up my generator if there's a power outage and run on battery power instead.

 

[Chalo]

That's a good price. Does Battery Hookup ever stock larger Lifepo4 packs?

Sometimes. It seems like they always have massive LiFePO4 prismatic cells that you could use to make 4S packs.

https://batteryhookup.com/products/12-8v-60ah-768wh-4s-lifepo4-battery

https://batteryhookup.com/products/4-new-eve-3-2v-280ah-lk280k-lifepo4-prismatic?variant=43864031232162

 

[harrisonpatm]

That's a good price. Does Battery Hookup ever stock larger Lifepo4 packs? I'm looking at 12V 100Ah packs to start building up my backyard solar to also accommodate backup power for my house (extension cords, not connecting to my house wiring) as well as charging my bike. Looks like 5 of these would provide a similar stored energy capacity of a 12V 100Ah, for about $100 less. Ideally I want to expand up the 12V 200Ah (2400 Wh), which should allow me to avoid firing up my generator if there's a power outage and run on battery power instead.

For a different thread, but if you're thinking about extension cord powering some house loads, you'll want to look at 48v system for thinner wires, instead of 12v. Say you want to run an 800w toaster. 800w/12v = 66 amps from the battery, and that's just on one toaster, assuming zero losses. You'd need 2-4awg wire or thicker. At 48v, same load, just 16-20 amps needed for 800w, only need like 8-12awg, depending.

And yeah, battery hookup has had a ton of great LFP prismatic options lately. Those self-contained 12 or 24v units that Chalo linked first are good for standalone, but their internal BMS's might disagree or get damaged if you want to run them in series or parallel. If you want to make something bigger, for bikes or home, you'll want to go with single-cell prismatics in series and parallel, with an aftermarket BMS added on.