The LB09 is a 25.6V 12.8Ah LiFePO4 battery for lighting equipment that has to keep working when the mains supply does not: self-contained emergency luminaires, exit signs, solar street lights, pathway and bollard lights, industrial high-bay emergency units and rechargeable work lights. It is a maintenance-free lithium pack rather than a lead-acid block, so there is no electrolyte to top up, no terminal corrosion to chase and no acid deposit to clean off.
Running at 25.6V nominal instead of 12.8V changes what the rest of the luminaire has to do. For the same wattage the pack delivers roughly half the current, so wiring and driver losses fall and longer cable runs inside a pole stay practical. That is why a 25.6V battery pack for street lighting systems is normally paired with a 24V-class LED driver or a charge controller set for an eight-cell LiFePO4 profile, and why the charger and cut-off settings deserve as much attention as the capacity figure.
Nothing about the interface is fixed until you fix it. The connector is supplied to customer requirements, and changes to lead length, case detail and protection thresholds are reviewed against your drawing before they are confirmed. That flexibility is exactly why these packs are built by a LiFePO4 battery factory to an approved specification rather than picked off a shelf — and it is also why the interface has to be written down before anything is built.
.svg)
| Item | Value |
|---|---|
| Product model | LB25.6V12.8Ah |
| Nominal voltage / capacity | 25.6V / 12.8Ah |
| Usable capacity | 327Wh |
| Internal resistance | ≤60 mΩ |
| Dimensions (L × W × H) | (186 ± 3) × (166 ± 3) × (76 ± 2) mm |
| Weight | 3.1kg |
| Charging voltage | 28.8V |
| Standard / trickle charge current | 10A / 10A |
| Discharging voltage | 20V |
| Discharging current | 10A |
| Connector | According to customer requirements |
| Charging / discharging temperature | 0 to 60 °C / −20 to 65 °C |
| Storage temperature | -20~60℃ |
| Design life | 5year 55℃ |
.svg)
The 25.6V 12.8Ah LiFePO4 battery charges at 28.8V with a 10A standard charge current and a 10A trickle current, so the charger must be set for a LiFePO4 profile at that voltage. A lead-acid charger whose float sits below the LiFePO4 absorption point will leave the pack short of full charge, and one that holds it at a high float for long periods is equally unkind. Confirm absorption, termination and temperature-compensation settings before the first charge, and check that the charger can be inhibited while the pack is cold.
On the discharge side the pack is specified down to 20V at a 10A discharge current. Set the driver or controller cut-off with margin above that figure so a cold morning or a deep dimming profile does not shut the luminaire down while usable reserve remains, and check the driver's startup current separately: inrush on a cold start is not the same as the steady load, and it is the number that trips protection.
Operating limits follow the chemistry — charging from 0 to 60 °C, discharging from −20 to 65 °C, storage from −20 to 60 °C. In a sealed luminaire head that usually means keeping the pack away from the driver's hot spot and giving the charge circuit a way to block charging below freezing. For storage, ask for the state of charge and inspection interval for this model rather than applying one rule to every battery.
Protection functions and their thresholds are defined per configuration, so request them for the revision you are buying instead of assuming a standard set. That detail decides whether a low-temperature charge is genuinely blocked or whether the pack simply reports a fault after the fact.
-826.svg)
-77.svg)
-875.svg)
.svg)
| Document | What it defines |
| Model specification | The current issue for the approved configuration, with electrical limits and protection functions |
| Outline drawing | Envelope, fixing points, connector position, lead length and polarity |
| Electrical data sheet | Charge and discharge limits, cut-off behaviour and temperature ranges |
| Test report | Tests carried out on the exact configuration being supplied |
| Transport documents | Lithium battery papers required for the destination and mode of carriage |
| Handling and storage instructions | Charging, storage state of charge, inspection interval and fault reporting |
| Declaration file | Which declarations are available for the pack and the market they cover |
Technical questions reach the people who build the packs. Our engineering group in Shenzhen reviews your device's voltage window, load profile, enclosure space and charger before proposing a configuration; our sample group then builds units so you can validate fit and runtime before production. Cell selection, BMS design and pack assembly stay in-house, with quality checks in process and at final inspection, and a documentation team handling certificates, test reports and shipping papers. When a unit behaves unexpectedly in the field, our engineers help trace the fault and advise on installation and commissioning.
Only after both halves of the interface are compared. Send the pack you are removing, the driver details and the charger details, and the proposed 25.6V 12.8Ah LiFePO4 battery is reviewed against them for chemistry, charge profile, cut-off behaviour, connector and compartment. A matching voltage label settles very little: two packs can agree on nominal volts and still differ in termination, protection thresholds or lead arrangement.
Start from the 327Wh usable capacity, subtract driver and wiring losses, derate for the coldest and hottest conditions the luminaire will see, and keep a reserve for capacity fade at the end of the design life. Then confirm the figure with a sample test on the actual load and the actual cut-off. For street lighting the overnight dimming profile matters more than the headline watt-hour number, so test against the profile you will really run.
Feasibility is decided against a drawing. Send the mating connector, the pinout, the polarity convention, the lead length and the installation drawing, and the LiFePO4 battery factory confirms what can be built and what any change does to the specification. Changes to the case or the internal layout take longer than a lead or connector change, so raise them early rather than at the sample stage.
Ask for the current model specification and the outline drawing for the configuration you are buying, the test reports that apply to that exact configuration, and the transport papers required for lithium batteries into your market. Check that every document names the same model and revision as the pack on the order — a report for a different pack or a general company statement does not cover yours.
No. The five-year figure is a design life at 55 °C; it describes how the pack is designed, not a cycle-life test result and not a guarantee of service in your luminaire. Real life depends on depth of discharge, ambient temperature and charging practice, so ask for cycle data measured under conditions close to your application and validate it with a sample before quoting a service life to your own customers.
