MTO Lithium Battery Version_2

After building and testing each lithium battery for sometimes I have learned and made improvement, cut down on build time, made it more robust. However, testing time is not cutting down.
Here is version_2 of my Lithium battery.

The black box can fit through Hobie 8" circular hatch.

Working with oversea supplier is very frustrating, product they promise to deliver is not up to spec…Example, power supply. It’s very critical to NOT over-charge or under-charger a lithium battery. It won’t have immediate effect for less than a year, since Grade A cell can take some beating. Lithium battery is meant to last for years if using and charging properly.

Look at the photos of these chargers, I think I bought them all to test. Some even has no loopback circuit(very bad). Some has the same outlook, but the internal is quite different. Go figure.I even bought a couple chargers from popular name brands…one start with Noxxx , another start with FPxxxx from aus to see how it does. Both of them also overcharge. My guess is they also suffer from the same issue with supplier.
Technical note: Components usually has 1-2% variation. A 1K ohm, can be 980 – 1020ohm.
With so many components inside, it can shift voltage around quite a bit.

It takes the challenge to my own hand, and modify every chargers to the spec. Then testing, if it passes, I lock down the value. This is the only way I can assure it will charge the battery correctly. 2A charger is not enough to cut down the charging time, so here it goes 4A charger will be supplied.

I am confident each battery I make is among the top performing and long-lasting battery on the market. I’ll bump up the warranty period to 18 months. I’ll fix and replace anything and everything if for some reason it fails within that period no question asked.

Four things that this lithium battery is superior than other on the market.
1.   Built on demand, so battery is fresh as it can be. Only Genuine cells are used.
2.   Each charger is modified true to spec.
3.   Longer warranty.
4.   True to Ah capacity. Unlike blue brick battery with exaggerated Ah.
----------------------------------------------------------
-   Built-in battery management system: short circuit, over-current discharge, over-discharge protection.
-   4A Li-ion charger included.
-   Extra layer fuse protection.
-   Each battery cells are tested for internal resistant. Then match them together to get the most out of the battery pack.
-   Waterproof hard case.
-   Sealed on all connectors.
-   Die-electric grease applied to all connectors.
-   Save tremendous weight over (SLA Sealed lead Acid Battery)
-   No current draw limit like other battery pack.
-   No corrosion on battery terminals.
-   Simple to setup, ready to go.
-   Back by 18 months warranty.

Blue box come with 4A chargers and everything to setup with a Fish Finder.
14Ah = $150
17.5Ah = $185
21AH    = $220

Black box come with 4A chargers, Dual USB chargers and everything to setup with a Fish Finder.
It's suitable as a power source for multi days camping trip.
24.5Ah  = $265
.....
.....
Up to 56Ah


P.S. The 42Ah black box was sold to fishingfan. 

I am confident each battery I make is among the top performing and long-lasting battery on the market. I’ll bump up the warranty period to 18 months. I’ll fix and replace anything and everything if for some reason it fails within that period no question asked.

Four things that this lithium battery is superior than other on the market.
1.   Built on demand, so battery is fresh as it can be. Only Genuine cells are used.
2.   Each charger is modified true to spec.
3.   Longer warranty.
4.   True to Ah capacity. Unlike blue brick battery with exaggerated Ah.
----------------------------------------------------------
-   Built-in battery management system: short circuit, over-current discharge, over-discharge protection.
-   3A Li-ion charger included.
-   Extra layer fuse protection.
-   Each battery cells are tested for internal resistant. Then match them together to get the most out of the battery pack.
-   Waterproof hard case.
-   Sealed on all connectors.
-   Die-electric grease applied to all connectors.
-   Save tremendous weight over (SLA Sealed lead Acid Battery)
-   No current draw limit like other battery pack.
-   No corrosion on battery terminals.
-   Simple to setup, ready to go.
-   Back by 18 months warranty.

Blue box come with 3A chargers and everything to setup with a Fish Finder.
17.5Ah = $185
21AH    = $220

Black box come with 3A chargers, Dual USB chargers and everything to setup with a Fish Finder.
It's suitable as a power source for multi days camping trip.
24.5Ah  = $265
.....
.....
Up to 56Ah


P.S. The 42Ah black box was sold to fishingfan. 

While I haven't personally purchased Chet's Lithium battery pack, I have seen him use the same setup advertised here for approx. the last 2 years. Chet knows how to build shit to last and will stand behind each and every single product he releases.

So are the 10 and 15 amp options no longer available?

Very impressive. That’s a ton of Ah for a good price...

So are the 10 and 15 amp options no longer available?

The 12Ah is no longer available. I still make 15Ah, but consider dropping it too.
18Ah/21Ah makes so much sense for 2 full days of fishing.
I think it's a good opportunity to explain why I don't make smaller battery, plus $10 increase in price.
It's due to the bigger and newer charger that includes with battery. It costs x3 times compare to older charger, plus I have to spend more time to modify the charger so it won't over-charge or under-charge.

It's one thing I cannot cut cost down without sacrifice performance and longevity of battery.
Yes, I truly aware how expensive lithium battery is and I built it to suit the need for us kayakers, something that is simple to use and will last a long time. I bump up the warranty to 18 months also.

Looking it at another angle. Dakota sells 10Ah battery for $100. Need charger $20. Need box, connector, something to secure it inside box.
After all said and done, it will cost around $150 for a 10Ah battery.

So are the 10 and 15 amp options no longer available?

If you are looking for a new kayak battery then I recommend Chet’s Lithium Battery.

This is a solid and well built piece and is well worth the money. It’s a great long term investment for a lithium battery that will be cheaper in the long run compared to lead acids.

I have one of his batteries and it lasts me a full weekend out on the water. 10+ hours at a time on the water plus using it to charge my GoPro batteries plus charging my phone and it still has a ton of juice left for another day or more. I wouldn’t buy a battery anywhere else.


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Can you run lights and accessories of of the battery?

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Can you run lights and accessories of of the battery?

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Yes. I have tested battery with, LED lights, bilge pump, FF, load of 3.5A draw simultaneously for hours.

What is the wait time on a 17 or 21? I want one. And how much to ship?

What is the wait time on a 17 or 21? I want one. And how much to ship?

2 weeks wait time. $10 for shipping, usually $16-$18 I'll pay the difference.
I'll send you a PM.

My typical desk view.
A 30Ah black box is about to be done soon, need a little more testing.
I love this new charger, cut down 60% of charging time.

30Ah is shipped.
18Ah picked up today.
One more 17.5Ah to go.

All battery comes with parts to either solder or crimp.

Just received 3 more boxes full of battery last night.
Fresh battery as they can be.