The 12V 18Ah LiFePO4 battery is a 12.8-volt block of 230.4 watt-hours on M5 bolt terminals. It steps out of the spade-terminal toy-and-alarm range into equipment that pulls a steadier working current, such as sprayers, mobility scooters and fence energizers.
Working Loads
Current for real tools
A FIMCO-class pump draws about 10 amps at 60 psi, which is inside this block’s 18-amp continuous rating. Run continuously it would empty the 18-amp-hour pack in under two hours, but spot-spraying pulses the pump in bursts, so one charge covers a day of work across several tanks. The M5 terminals take the ring lugs that heavier wiring uses rather than the push-on spades of the smaller blocks.
Mobility
Range from the pair
Mobility scooters run 24 volts from two 12V batteries in series, and this is a common size for them. At roughly 20 watt-hours a mile, a pair of these blocks holds about 23 miles of range, and the lithium weight saving of two to three kilograms a battery lifts off the frame the rider carries.
Standby
Fences and lamps
The same block sizes the battery on a higher-wattage solar street or area lamp for the nights of autonomy an installer specifies. On those duties it cycles shallow and rests charged, and it replaces a lead block of two to three times its weight.
Fencing
Sizing a fence charger
A 12-volt fence energizer draws on the order of half an amp on a typical unit, which this 18-amp-hour pack alone would carry for about a day and a half, which is why these installations pair the battery with a solar panel matched to the energizer: 6 to 10 watts for a half-joule unit, 12 to 20 watts for one to two joules. A low-drain energizer of a few tens of milliamps runs a week or more between charges.
Data
Datasheet
| Model | DC12-18 |
|---|---|
| Nominal voltage | 12.8V |
| Capacity | 18Ah |
| Energy | 230.4Wh |
| Charge voltage | 14.6V |
| Discharge cutoff | 10V |
| Continuous discharge | 18A |
| Peak discharge | 36A (5s) |
| Cycle life | ≥3,000 cycles |
| Weight | ≈2.1 kg |
| Dimensions | 181 × 77 × 167 mm |
| Terminals | M5 bolt |
| Operating temperature | Discharge -20~60°C / Charge 0~45°C |
| Certification | UN38.3 / CE / FCC / RoHS |
Fit
Terminals and charging
Torque the M5 ring lugs to the datasheet figure and check the joints after the first hard use. Charge at 14.6 volts from a lithium charger, or set a solar controller to an LFP profile with no equalization stage for a panel-fed installation. The BMS carries overcharge, over-discharge, overcurrent, short-circuit and low-temperature charge protection, discharge runs from minus twenty to sixty degrees, and storage sits at 30 to 50 percent charge.
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