LiFePO4 packs promise the two things budget lithium-ion cannot: long cycle life and chemistry that resists fire. The LFPNERYE 48V 25Ah LiFePO4 ebike battery brings both claims at a price that undercuts nearly everything we track, roughly 1,200 watt-hours for about 17 cents per watt-hour.
The catch is printed on the listing itself. The pack claims 25 amp-hours in 17 pounds, and the weight arithmetic for that chemistry sits at the extreme edge of what lithium iron phosphate cells can do. There are also two amp figures for the BMS, and the listing names no bike it fits.
This is a pack to verify on arrival, not one to trust on faith, and the price is what makes the verifying worth it.
The weight only closes at the top of the chemistry
Run the numbers first, because they shape everything else. The bullet prints 17.02 pounds, 7.72 kilograms, and the parameters image card prints 16.98, so the listing's two weights at least agree with each other. Twenty-five amp-hours at a 16S LiFePO4 configuration is 1,280 watt-hours by the seller's own cell math, or 1,200 by the plain 48V label.
Lithium iron phosphate cells hold roughly 0.095 to 0.172 kilowatt-hours in every kilogram of cell, a chemistry that trades energy density for safety and lifespan. At 1,280 watt-hours, the bare cells alone would weigh about 7.4 kilograms at the very top of that measured range. The printed total for the whole pack is 7.72.
That leaves under 0.3 kilograms for the case, the BMS board, the wiring and the connectors, which is not how finished packs are built. Even on the kinder 1,200-watt-hour reading, the cells need about 7 kilograms and the packaging budget is under 0.75.
For contrast, lithium iron phosphate packs normally run heavier per watt-hour than standard lithium-ion, not lighter, because the chemistry stores less energy per kilogram in the first place.
I want to be precise about what this means. It is arithmetic, not an accusation. Either the cells are genuinely at the extreme top of what the chemistry delivers and the case weighs almost nothing, or one of the printed figures, the capacity or the weight, is optimistic.
You cannot tell which from the page. What you can do is weigh the box when it arrives and meter a full charge inside the return window. A pack that lands well over 17 pounds on your scale is carrying something the listing did not count.
The listing argues with itself about amps
Four places on this listing say the BMS is 50 amps: the title, the BMS bullet, and both image cards. One place says 40: the specifications bullet, which prints "40A BMS" right next to the size and weight.
This is the same fault class we found on the Haipackba 25Ah pack this month, where two bullets could not agree on the current ceiling, and the advice there holds here. Plan around the lower figure until the seller answers. At the 16S nominal voltage of 51.2 volts, 40 amps is a 2,048-watt ceiling, and the 50-amp reading gives 2,560.
The title claims compatibility with 250W to 2400W motors, and that top figure needs the 50-amp board. A 2,400W motor at 51.2 volts draws about 47 amps, over the 40-amp bullet and under the 50-amp title.
The BMS image card hedges in a useful way, noting that the real limit "depends on the rated current of controller or motor". Practically: if your motor is 1,500 watts or less, either board covers it with room. If you are shopping this pack for anything near 2,400 watts, ask the seller which board ships before you order, and get the answer in writing.
The voltage label is marketing, the charger question is real
The seller prints an unusual line in the specifications bullet: "48V 25AH LiFePO4 Battery = 52V 25AH LiFePO4 Battery. As both 48V and 52V batteries use the same configuration: 16S1P". That is a label argument, and the physics behind it is worth understanding because it decides which charger works.
A 16S lithium iron phosphate pack runs 51.2 volts nominal, sixteen cells at 3.2 volts, and fills to 58.4 volts, sixteen at 3.65. The listing's own voltage bullet agrees, printing the 99 to 100 percent band as 53.6 up to 58.4 volts.
In practice this pack behaves like a "52V" unit: its full-charge voltage sits close to a 14S NMC pack's 58.8, and far above a 13S "48V" NMC charger's 54.6.
That comparison matters for one purchase decision. A standard 48V lithium-ion charger outputs 54.6 volts, and 54.6 will never fill a 58.4-volt pack. If you already own a 48V charger, it is not a backup for this battery, it is a way to run it permanently half-charged.
The image cards show a 5A fast charger in the box, and the verified owner's report of a 5-hour full charge matches that arithmetic exactly: 25 amp-hours at 5 amps is a 5-hour floor.
But the bullets and the spec rows never name a charger, so confirm the box contents on arrival and check that the charger's label reads 58.4 volts before you rely on it. The same check runs the other way: your controller needs to tolerate a pack that peaks at 58.4 volts, which most 48V systems were never designed to see.
The record cannot answer the questions that matter
Two written texts sit under the five-star average, and the top-voted one carries no purchase badge. It is two sentences of generic praise about consistent power delivery, and it could describe any pack on the market.
The verified text, from October, is more useful. One owner has reported delivery trouble that was the carrier's fault, an undamaged pack, a 5-hour full charge, and rides since with no complaint. That is a genuine positive signal, and the charge-time detail is the one checkable claim in the whole record.
What nobody has reported is anything that settles the big questions. No metered capacity figure, no cycle count, no water exposure, nothing about the 40-versus-50 amp question.
Two texts with zero mid-stars is not a track record, it is the start of one. The honest position is the one the old version of this article took: the brand is new to the platform and unproven. The difference now is the price makes the gamble cheaper than it was when we first covered this pack.
What the price buys, and what the cycle claims really say
At the live 209.00 price, this lands in the cheapest fifth of the 301 packs in our ebike battery comparison table, and the exact position renders in the specs box there. The stored row still prints 229, so the specs box reads slightly high until the next data pass.
For contrast, the Sinigerel pack we covered this month is the only recent rebuild cheaper per watt-hour, at about 15.6 cents for 960 watt-hours with a charger in the box, and it is ordinary lithium-ion. The Lockbus USB and Haipackba packs sit near 22 and 23.
The cycle claims deserve a note precisely because they are modest. One image card prints capacity holding above 80 percent after 1,500 cycles, another says up to 80 percent after 1,000. Those two cards cannot agree, but neither figure is inflated.
Lithium iron phosphate cells measure 2,500 to 9,000 cycles under lab conditions, more than 3,000 under most conditions, where ordinary NMC cells manage 1,000 to 2,300. Budget sellers usually print the top of the band. This one printed the bottom, which is either honesty or low ambition, and either way the chemistry is the reason a buyer who keeps a pack for five years should care about it.
The warranty stacks a 3-month return, resend and refund window on top of a 12-month free-repair warranty, and the manufacturer of record is a Guangdong battery company rather than the brand on the title. Keep the order documentation and front-load your testing into the first three months, where the strongest protection lives.
Frequently Asked Questions
Will it fit my bike?
The listing never says. No bike brand or model appears anywhere in the text, the fitment bullet tells you to check the listing images, and the images contain a size chart rather than a compatibility list. What you get is a 9.3 by 5.7 by 5.1 inch rectangular case and the question the seller's own card asks: is there enough space for it?
Measure your frame's battery bay against those three numbers and contact the seller with your bike model before ordering, because there is no published fitment list to fall back on.
How far will it actually go?
The seller's own parameters card prints 25 to 35 miles, which is a strangely low figure for 1,200 watt-hours. Assist level, terrain and rider weight drive consumption, and at a gentle 16 watt-hours per mile of pedal assist this much energy should carry you well past 70 miles. The seller's figure only makes sense as a throttle-heavy or high-power estimate.
Do your own division with your own number, and treat the printed 25 to 35 miles as a floor for hard riding rather than a promise for gentle riding.
Can I use my existing 48V charger?
Only if it outputs 58.4 volts, which almost no 48V lithium-ion charger does. A standard 13S charger peaks at 54.6 volts and will leave this pack permanently undercharged. Check the charger in the box for a 58.4V label, and if you need a spare, buy one specified for 16S lithium iron phosphate, not a generic 48V unit.
Is the 17-pound weight a problem?
The weight is the question mark on this listing, not a spec. The arithmetic in the weight section above shows the printed figure only works if the cells sit at the top of the chemistry's measured density with almost nothing left for the case.
Weigh the pack on arrival. If your scale reads well over 17 pounds, you have learned something the listing did not print, and the return window is the time to act on it.
Who should skip this pack?
Skip it if you need a proven record before spending, because two texts cannot give you one, and the weight arithmetic gives you a reason for caution that the ratings cannot cancel.
Skip it if your bike wants a 48V system that must never see 58.4 volts. Buy it if you want maximum watt-hours per dollar in a LiFePO4 pack, your controller tolerates the full-charge voltage, and you are set up to weigh and meter a pack in its first week.
Our latest ebike reviews cover the rest of the cheap-48V field, including the Lockbus USB pack and the Sinigerel 20Ah pack for buyers who want a charger and cable in the box at a similar price.