14.8V 15Ah Lithium-Ion Battery with Charger

The 14.8V 15Ah Lithium-Ion Battery is designed to support live imaging and forward-facing sonar systems, making it an excellent fit for devices like Humminbird MEGA Live Imaging™, Garmin Livescope™, and Lowrance ActiveTarget™. With a balanced combination of power and portability, it ensures your sonar equipment operates smoothly during your fishing adventures.

Click here to get more.

This battery is equipped with Dual IPX8-rated waterproof USB-A and USB-C ports, offering rugged and reliable charging options in wet or challenging conditions. The improved state-of-charge indicator provides an easy way to monitor power levels at a glance, so you always know when it’s time for a recharge.

To maximize battery life, the Deep Sleep™ feature disconnects power from the terminals, eliminating self-discharge during periods of inactivity. This ensures that the battery retains its charge even after long periods of storage, giving you peace of mind and ready-to-go performance when you need it.

Thanks to its integrated Bluetooth technology, you can easily track and adjust the battery’s settings using your smartphone through the Norsk Guardian® App. This capability allows you to stay informed about the battery’s health and performance, ensuring that your sonar system continues to operate efficiently throughout your time on the water.

DEEP SLEEP™

Disconnect power from your battery’s terminals using this feature in the Norsk Guardian® app to eliminate fully-discharged batteries caused by phantom draw – storing your battery has never been easier!

If you are looking for more details, kindly visit SINC.

ONE-TOUCH POWER MANAGEMENT

The Power Management button allows the user to quickly check State of Charge, and manage advanced features such as Deep Sleep™ or BMS reset.

IP67 WATERPROOF

IP67 Waterproof ensures that your Norsk Lithium Battery is fully protected against dust and capable of withstanding immersion in water up to 1 meter deep for 30 minutes. This high level of protection guarantees that your battery remains operational in the harshest environments, providing reliable performance and durability.

NORSK GUARDIAN APP INTEGRATION

Seamlessly manage your battery’s performance with the Norsk Guardian® App. Monitor battery status and control the Deep Sleep™ mode all from the convenience of your smartphone.

THE NORSK ADVANTAGE

Our batteries stem from the dedication of outdoor enthusiasts relentlessly pursuing advanced rechargeable lithium technology to power their passions. Recognizing the urgency of a robust power source, the Norsk 14.8V 15Ah Lithium-Ion Battery is designed to endure over 2,000 charge cycles, backed by an exceptional warranty. Enjoy a standard 4-year warranty, plus an additional 2 years when you sign up for the Norsk Guardian® App, ensuring enduring performance. Whether you’re braving the cold on a fishing trip or embarking on an off-grid adventure, you can trust Norsk Lithium® to deliver reliable power when you need it most.

If you want to learn more, please visit our website 15ah Lithium Battery.

Hi Guys & Girls, I have a scooter and had SLA's and when it was time to change them, I bought a 48v 15Ah LifePo4 16s battery from Sun Thing @ 2 years ago. I tested it at the beginning and it produced @ 14.5 Ah and seems to balance fairly quickly. My average trips are @ 6-10 kms, and have done a few 40km trips. I also do @ 100 trips a summer to back & forth to work that is only 2 kms (1km each way) and I end up charging the battery at the shop. I have done @ kms with the scooter with the 48v 15Ah LifePo4.

I just wanted to ask a few questions...

1) It came with a bulky 5amp charger (it also charges to 59.9v), but I tend to always use my spare 3amp 48v charger that appears to charge up to 59.9v and stays there while it balances the pack. Is the 59.9v a little high, and is it damaging the cells?

2) When I take the battery off the charger, the voltage drops to 55 or 56v, and if I ride the scooter a little, it will stabilize at 53.24v (I presume this is good since 3.3v x16 = 53.28v)...?

3) I am curious what is a normal voltage drop as when I ride and draw .5C (7-8amps) the voltmeter says @ 51v, and when I draw @ 1C (15-16 amps) the voltage drops to 49v. If I hammer the throttle and draw 25amps, the voltage drops to @ 47v. I presume that these are normal/healthy numbers for a 15Ah LifePo4 battery?

4) I am a big guy (250lbs) and ride at @ 22km/h (appears to be a quiet/efficient speed) and have figured out that the scooter consumes .4Ah per km, or 20Whr/km. If I did @ kms on the scooter, at 20Whrs/km, I assume I consumed 40k watt hours. So if my calculations are correct, I have only used @ 55 cycles from it, and the battery should do @ cycles...?

5) So it appears that I will never wear out the battery from exceeding it's cycle life specs, but how long does a LifePo4 used this way last.... 3,5,7,9 years?

You guys are simply amazing with all your knowledge, so thanks in advance for any replies and info that you can share.

IAN

Attachments

• 48v 15Ah LifePo4.jpg
• Charger 3amp.jpg

eTrike said: Number seem typical for generic LiFePO4.

For comparison I've got a few year old generic 48V LiFePO4 pack that had a bum BMS, corrosion and 1-2 bad cells when I got it. The remaining 14 cells all had 95-98% of original capacity. The internal resistance (as seen in your voltage drop under load) is much higher than my 6-8 year old A123s that have been flogged without regard, so it isn't nearly as powerful, but this cheap 10AH pack is capable of running a W setup. If the same holds true for your pack @15Ah, I would expect it is within its limits seeing only 25A peak.

eTrike, If I understand correctly, you are using A123 cells which are amongst the top tier cells, I didn't think that the SunThing Lifepo4 pouches would produce the same specs.

One thing that I have learned here is that you really have to identify your usage parameters : current draw, distance, lifespan, cycles, cost, and cell composition (ex: fire/explosion), budget, etc....

For $315 for a 48v 15Ah Lifepo4 pack, that appears to be giving me the performance according to the manufactured specs, I am pleased to have gotten basically a Plug & Play battery pack that beats lead, nicad, nimh, and doesn't require me to become a battery engineer and charge them in a BBQ...

From what I see, a 25amp controller, with a km distance per summer season is really low on the requirements scale. I would like to ask Santa for 16x GBS Lifepo4 20Ah cells (the grey hard plastic casings) and build a 48v 20Ah battery, but it would be @ $700. Maybe Santa will think I have been good and surprise me... lol

Thanks again for replying, IAN It IS a lot of sag. But that's fairly typical for the inexpensive lifepo4 pouches. And the use is a bit harsh, at least relative to a lighter rider on a bicycle, who pedals to help an amps worth.

Two solutions possible for your next battery,,

One would be a much higher c rate pack. But I'm not sure the problem really makes the pain in the ass and hazard of lipo worth it.

The other would be a bigger pack, 20 ah would make the c rate lower on all the cells, splitting the amps between 4 pouches instead of 3 like now. But really? to go 2k per charge? Honestly, for that length trip you could go back to lead.

By the 4th summer as internal resistance increases, that sag may get really bad, but as long as it doesn't hit the LVC of the controller or bms, you can keep on going with it.

I don't think the charger you have will be adjustable. The metal case ones usually are, but not the cheaper plastic. You could buy a very cheap 48v lithium charger, for 16s lifepo4, that is set to 58v. More typical is 15s with lifepo4 nowdays, and that would be too much undercharge, at 54.6v.

A more expensive charger, like from EM3ev, could be custom set to the voltages you prefer. three way switch, so one could be 59v, the other 56v, the third a half charge that is used when you will store the battery with the bms unplugged.

dogman dan said: It IS a lot of sag. But that's fairly typical for the inexpensive lifepo4 pouches. And the use is a bit harsh, at least relative to a lighter rider on a bicycle, who pedals to help an amps worth.

Two solutions possible for your next battery,,

One would be a much higher c rate pack. But I'm not sure the problem really makes the pain in the ass and hazard of lipo worth it.

The other would be a bigger pack, 20 ah would make the c rate lower on all the cells, splitting the amps between 4 pouches instead of 3 like now. But really? to go 2k per charge? Honestly, for that length trip you could go back to lead.

By the 4th summer as internal resistance increases, that sag may get really bad, but as long as it doesn't hit the LVC of the controller or bms, you can keep on going with it.

I don't think the charger you have will be adjustable. The metal case ones usually are, but not the cheaper plastic. You could buy a very cheap 48v lithium charger, for 16s lifepo4, that is set to 58v. More typical is 15s with lifepo4 nowdays, and that would be too much undercharge, at 54.6v.

A more expensive charger, like from EM3ev, could be custom set to the voltages you prefer. three way switch, so one could be 59v, the other 56v, the third a half charge that is used when you will store the battery with the bms unplugged.

Thanks Dogman for the info. I don't see myself going with Lipo, as my main desire is to have something simple & very safe to use.

You bring up a few points:

1) Now about the charger charging to 60v, it appears that it is the norm, and not a huge problem in respect to any longterm damage or performance loss? I don't see myself spending $100 for a metal charger, especially since I have a few of the 3amp & 5amp SunThing chargers as spares.

2) Now about my short trips to the shop (1 km each way), am I better off to charge it every 3rd or 4th day, VERSUS putting it on the charger every day and topping it up?

3) Now you mention a 20Ah pack, I agree with this. However aren't these 48v 15Ah batteriess made up with 16s (thus 16 x 15Ah pouches)?

4) As per my original post (question #4), are my calculations correct. I have done @ 55 cycles in 2 years, so irregardless of battery cells, they will die of old-age versus dying of exceeding performance life?

Thanks for your replies, IAN.

dogman dan said: Normally, I'd say charge daily, but since your trips are that short, It could result in a longer lifespan to charge only when you need to. Not weeks, but certainly you could get by with charging only one time a week. That's 10k of riding. Ideally, have the pack sit around 100% full as short a time as possible without being inconvenient. So one charge a week will be easier on it's lifespan, in your case. Charge Mondays, at work maybe?

IMO, your pack is going to eventually die of old age, 3-4 years being typical for that kind of lifepo4 pack. But your use is so light, maybe longer. I just haven't heard of sun thing, or similar ping packs lasting much longer than 4 years.

As for the size of the next pack, so far those type packs use 5 ah pouches. So you can get them in 10-15-20 ah and so on. Possibly sun thing only offers one size though.

Dogman, I think I will follow your suggestion about charging the pack at the end of the week, since I may have only used it so lightly. I guess the daily charging is coming from my SLA days...

Like you said, my LifePo4 pack will die from old-age rather than cycles, so even if I get 4-5 years out of it, I will definitely get another similar pack. It's serving my needs well and virtually Plug & Play.

SunThing sells 15, 20, 25, 30Ah versions, so from what you tell me it is 3p16s (3 x 5Ah packs in parallel, and 16 of those in series)? Either way, I find that I got lucky, and it's an excellent value (considering).

Thanks again for taking the time to reply to my post, IAN.

PS: How is that battery pack you got from (I think ) AliExpress recently going...?