Brand new, Grade A, and sized to sit in the rack space most 300 Ah-class projects are already drawn around. This cell carries a 314 Ah nominal rating at 3.2 V, and the cells in our current runs test close to 330 Ah — headroom a pack designer can use to derate for long life instead of running the cell at its ceiling from day one.
The chemistry behind that choice is lithium iron phosphate. There is no cobalt or nickel in the cathode, thermal runaway is far harder to trigger than in a ternary cell of the same format, and the flat discharge curve holds voltage steady across most of the charge, which makes life easier for the BMS balancing a long series string.
Capacity per cell matters as well. A 314 Ah unit stores roughly 12% more charge than the 280 Ah cells it commonly replaces, so a 16S pack reaches the same energy with fewer parallel strings, fewer busbars and fewer balance leads. Less hardware in the enclosure, fewer joints to torque, one less place for resistance to creep in.
We ship EVE LiFePO4 cells from single grading runs rather than mixed pallets, so every unit in a pack shares the same batch history, and we hold CATL, CALB and Farasis stock alongside this model when a project needs two chemistries on one purchase order.
Buyers comparing LiFePO4 battery manufacturers tend to ask the same three things: is the cell genuinely Grade A, does internal resistance hold across the batch, and will the export paperwork clear freight the first time. All three are answered here with data, not adjectives.
| Parameter | Rating |
|---|---|
| Battery model | EV-MB31 |
| Battery type | LiFePO4 battery cell |
| Nominal voltage | 3.2 V |
| Nominal capacity | 314 Ah |
| Working voltage | 2.5 V – 3.65 V |
| Max charge current | 0.5C |
| Max discharge current | 0.5C |
| Peak discharge current | 1C |
| Internal resistance | ≈0.18 mΩ |
| Cycle life | ≥8,000 cycles |
| Battery size | 173.7 × 71.7 × 207.2 mm |
| Battery weight | 5.60 kg |
Lithium iron phosphate battery chemistry became the default for stationary storage because it fails gracefully. The phosphate bond holds oxygen tightly, so an abused or overheated cell is much less likely to enter thermal runaway than a ternary chemistry of the same size — the property site inspectors and insurers ask about first when a cabinet sits inside a building or a container.
Cycle life is where the numbers usually get loose. Most lithium iron phosphate battery suppliers quote a cycle count without saying how it was measured. This cell is rated at ≥8,000 cycles, and the qualifier that matters is how it is cycled: 0.5C in, 0.5C out. Run it gently and calendar life, not the cycle count, is what usually decides when a pack is retired; push it at 1C continuously and the headline figure is not the one you will observe in service.
Cost is the other reason. The cathode uses iron and phosphorus rather than nickel and cobalt, so raw material is cheaper and far less exposed to metal price swings. That shows up as a lower cost per stored kilowatt-hour over the life of the pack rather than as a lower sticker price on the cell.
Self-discharge is minimal, which matters more than it sounds for seasonal work — a cabin bank or an irrigation pump that sits idle for months comes back with almost everything it left with, so the BMS has very little to recover.
There are no toxic heavy metals in the chemistry, which makes end-of-life handling and recycling simpler in markets with strict waste rules.
LFP is the wrong pick in one situation: sustained high-rate discharge in sub-zero conditions, where a ternary cell holds up better. We supply both chemistries and will say so before you commit to a design.
The window is wide, but it is not symmetrical, and the difference matters in the field. Charging runs from 0 °C to 60 °C. Discharging runs from -30 °C to 60 °C. Storage sits between -20 °C and 45 °C.
Charging below freezing is the mistake we see most often. An LFP cell will happily deliver current at -20 °C, and because it does, crews assume it can take a charge in the same conditions. Below 0 °C it cannot: lithium plates onto the anode instead of intercalating, and the damage is permanent. Set the low-temperature charge cut-off in the BMS and leave it there.
At the top end, 60 °C is a ceiling rather than a working target. Continuous operation near it accelerates calendar ageing even while the cycle count still looks healthy. Ventilate the enclosure and keep it out of direct sun.
Storage deserves its own rule. Held between -20 °C and 45 °C in a dry room, this lithium iron phosphate battery loses very little charge and ages slowly; months above 45 °C is what shortens life before the pack is ever built.
The chemistry helps here. LFP does not release oxygen under abuse the way ternary cathodes do, so a shorted or overcharged cell is far less likely to propagate a fire to its neighbours — which is why this LiFePO4 prismatic cell is the one we recommend for cabinets that sit inside occupied buildings.
| Aspect | A-grade cell | B-grade cell |
| Definition | Fully meets every specification; zero defects | Fails to meet one or more standard parameters but remains functional, usually with minor flaws |
| Measured capacity | Matches or exceeds the datasheet value | Often falls below the datasheet value |
| Cycle life | Long; retains most of its capacity after thousands of cycles | Shorter; capacity fades faster than A-grade |
| Safety and stability | High; stable across conditions with complete protection in place | Acceptable; slightly higher risk than A-grade under extreme conditions |
| Price | Higher; the reference price for the model | 50%–90% of the A-grade price, sometimes lower |
| Recommended for | Production packs and warranty-backed projects that ship to an end user | Non-critical or experimental builds where failure remediation costs are low |
Most feedback on this model arrives as a second order, usually with the same comments attached. Pack builders working with EVE LiFePO4 cells mention that measured capacity lands above the nominal figure on their incoming test — which is what makes a 314 Ah nameplate workable in a design originally drawn around 280 Ah cells. Assembly teams mention the internal resistance spread inside a batch being tight enough that they do not re-sort before stacking a 16S string.
Buyers who came to us after trouble elsewhere tend to mention the paperwork first: the UN38.3 report, MSDS and transport assessment arriving before the freight booking rather than after it. Others mention smaller things — terminals arriving protected, cartons that survive a sea leg, and a technical contact who can answer a BMS question without escalating it three times.
None of that is exotic. Most lithium iron phosphate battery suppliers can send a datasheet and a certificate pack. What buyers mention more often is being told plainly when a 314 Ah cell is the wrong choice for the duty cycle they described, rather than being steered to whichever model carries the stronger margin that month.
The complaint we do hear is weight. A 16S pack is not something two people carry up a stairwell comfortably, and the packing has to be planned around that. Better to know now than on delivery day.
If you would rather hear it from someone facing the same decision, ask your sales contact whether a reference project in your application area can be shared.
| Topic | Detail |
| Minimum order | No strict minimum; small sample quantities can be arranged for evaluation — confirm current sample terms with your sales contact |
| Warranty | 2 years |
| Shipping terms | FOB, CIF, DAP and DDP available for most countries; DDP (door to door, duty paid) is the one most customers choose |
| Packaging | Confirmed per order — send your carton, pallet or container plan and we will quote the packing around it |
| Lead time | Confirmed per order; depends on quantity and the EVE batch you need |
| Custom builds | Custom LiFePO4 battery pack work and pack-level OEM/ODM available — send drawings, BMS requirements and target pack voltage |
| Payment terms | Confirmed with your sales contact for your destination and order size |
Every order is checked before it leaves us. In-depth partnerships with CATL, CALB, EVE, Farasis and other leading manufacturers give us traceable, original-brand cells, and our team runs a full inspection pass on every shipment, with sampling checks on packaging and labels. Anything that fails is held back, replaced and reported to you before dispatch. You are welcome to send your own inspector or appoint a third-party agency; we arrange access, samples and the documents they need, and the same paperwork travels with the goods.
No — this is a bare cell. You receive a single 314 Ah prismatic unit; the BMS, enclosure, busbars, compression hardware and cabling are all part of your own pack design. That is deliberate: pack builders fit the cell to their own mechanics and BMS rather than working around someone else's enclosure.
Mechanically, very often. The footprint sits in the same family as most 280 Ah prismatic cells, so a rack designed around the older size usually accepts this one without a redesign. Check three things before you commit: terminal type and spacing, height clearance inside the enclosure, and whether your BMS is configured for the higher capacity — energy goes up roughly 12% per cell at the same voltage, so the string total changes and the BMS settings have to follow.
The cell ships with the full certification pack for your destination market. Compliance is applied per batch and per market, so your sales contact can confirm exactly which documents cover your order before it is booked.
Not in a pack you intend to run for years. Series strings amplify small differences: a cell with lower capacity or higher internal resistance hits its voltage limit first on every cycle, and the BMS then throttles the whole string to protect it. Keep one string to one model and, where possible, one grading run — ask for matched cells when you order.
Keep them in the original packaging with the terminals protected, in a dry room away from direct sun and away from anything that could fall against the casings. At 5.60 kg each they should be stored low and never stacked beyond what the packaging allows. Check open-circuit voltage on a sample before you start building — a cell that has drifted noticeably from its neighbours is worth isolating before it joins a string.
