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Up for sale are brand new 100 ah 3.2v LiFePo4, Great Power (SHE: 300438) branded Battery cell with 3 year manufacturer warranty. Now the affordability made them a perfect replacement of the acid battery in terms of high output, long life cycles and reduced weight/size.

Since some users reflected that they'd prefer laser welded threaded rod, we have now added that too, so you don't need to worry about adding bolt glue and the tightening torque. Now simply tighten the nut hard enough and it will be a perfect contact, never worry about uneven load due to improper connection.

From late 2021, the manufacturer, Great Power (SHE: 300438), has updated the dimension to 170w 135h 40d from 130w 205h 35d. Hence please be aware any 100ah models that are not with this dimension are not latest stock

Perfect if you'd like to wire your own 12v or 24v pack for the caravan, camping power or solar energy storage. Some sample setup: 4x 100 ah 3.2v cells wired in 4s mode makes a 12v 100 ah pack, 8x 100 ah 3.2v cells wired in 8s mode will make a 24v 100 ah pack, 8x 100 ah 3.2v cells wired in 4s2p mode will make a 12v 200 ah pack.

They are grade A cells from Great Power, one of the top manufacturers of LFP batteries for new energy cars. They are brand new, hence come with excellent uniformity, longevity and over specs capacity. The nominal capacity is 100ah, and actual capacity is around 102ah, with super low self discharge and low IR (nominal value around 0.5 mΩ).

With each order, free connection kits (bus bars and heavy duty m6 hex serrated flange nut) will be supplied for free according to your setup. So if you leave a message with the order indicating your setup, the matching amount of bus bars/screws will be supplied. If you don't bother leaving a message that's also fine, I will assume your setup is the one that uses the most bus bars and supply them accordingly so you only ended up with several extra instead of being short of them.

The specs are as below:

General Specification	Model Name	3.2V 100Ah
	Max continuous discharging current	1C (100A)
	Max continuous charging current	1C（100A）
	Max Capacity(mAh)	102Ah +- 2Ah
	Minimum Capacity(mAh)	100Ah
	Max Charge Voltage(V) Recommended Charging Voltage	3.65V 3.45V
	End voltage(Cut off)	2.5V
	Nominal Voltage(V)	3.2V
	Max. Discharge Current (10 seconds)	3C
Dimension and Weight	Dimension	170W135H40D (mm)
	Net Weight of cell	1.9±0.1 kg
Suitable for	RV, Solar/off-grid energy storage, boat, 4wd camping (with inverter), construction temp power (with inverter), golf trolley/carts.

Some tips about buying LiFePo4 batteries:

Make sure you get brand new grade A product. Buying the correct cells never solely involves capacity. Yes the actualy rated capacity (make sure it's 40A load rated not some BS 5A load rated) should meet the specs, but you also need to make sure the IR (Internal Resistance) is within nominal range, a decent capacity / weight ratio. Some cycled batteries with a dropped capacity (e.g. a cycled 200ah battery has a dropped capacity of 170ah, and some sellers sell them as new 170ah, and this 170ah is definitely no good as brand new 170ah out of the factory) normally has signs of a smaller capacity / weight ratio. Used batteries normally tend to have a higher IR and swallen case too. While you won't really encouter any physically swallen batteries, you do need to make sure the batteries aren't with a significantly high IR (within 0.4mΩ for 100ah, within 0.2mΩ for 200ah, and within 0.15mΩ for 270ah all could be considered normal). A high IR not only generates heat, it also move the introduces higher voltage rise/drop during charging/discharging process hence reduce your usable capacity.

Which brand to choose? While there are some so called 'tier A' brands, it really comes down to the specs when it comes to performance. LFP has be out there for quite a while and it's a mature technology, so most brands actually works the same giving the same specs, and the price is pretty flat at per ah price giving their specs are similar. There is no need to chase a particular brand, and sometimes chasing a so called sought after brand could even lead to pitfalls. For example, brands like CATL, CALB are generally good brands, but that means nothing if you are buying its product with previous generation technology. e.g. some of the CALB cells using old technology were still good, but they come with a much lower capacity / weight ratio, and their market price is acutally lower than the less renowned brands, it's definitely not right if you are paying the same or even higher price for them. So, again, when it comes to the batteries, it's always correct to look at its specs, i.e. capacity, IR, max continuous discharge current, and capacity / weight ratio.

Is it difficult to look after LFP batteries? Absolutely no, as a matter of fact, lfp batteries are one of the most forgiving batteries in lithium battery family. There is only one thing your shouldn't do with it, that is to apply the lead acid battery mindset to them. To be exact, you shouldn't charge them with acid battery voltage, you shouldn't do 'absorbtion charging' on them, you shouldn't do 'float charging on them and keep them full', you shouldn't store them at full voltage. In simple words, you don't over charge it, when they hit the target voltage, that's it, stop charging. And when you are going to store it for over 6 months, leave them below 90% state of charge instead of being at 100% and they will be happy. Simply by doing this, you can get the claimed cycles out of them, easy as.

The (DOD) depth of discharge of acid batteries are normally around 15-30%, for deep cycle batteries you can go 50%- 80% but that DOD requires immediate charge, it can't stay there for long for the sake of lifespan. But LFP batteries can go 100%, and in practice, going 80% DOD will ofter you uncompromised lifespan. That means you are getting more usable capacity.

Under high current load, acid battery has a significantly dropped capacity, e.g. a 100ah acid battery only gives you around 40ah capacity when you pulling 100a current continously. And the capacity of acid battery is rated using 20 hour method. On the other hand, LFP batteries is not sensitive to the output load at all. A 100ah rated battery still gives you around 90ah capacity when you pulling 100a current.

While acid batteries' lifespan ranges anywhere from 500 cycles to 1500 cycles, think of your actual experience, how many cycles you get out of your acid batteries? The reason to this difference is acid batteries lifespan is not rated under reallife environment. It's rated using 20 hour method and that's not how we actually use it. While for LFP, as long as you use the correct charging setup, and keep it cycling with 80% DOD, it will give you claimed lifespan of of claimed cycles (2500 cycles with 80% DOD, or 8000 cycles with 20% DOD, until its capacity dropped to 80%, after which point it becomes not suitable for e-vehicles, but still usable for engergy storage), simple as that.

Then there is weight difference, cold temperature performance etc. there are plenty materials about that.

Local pickup will be welcome, please just message me to organise, and I'll be happy to deduct freight for you.