- Ultimate LiFePO4 professional level battery charger. High efficiency diagnostic charger and tester for LiFePO4 / LFP batteries.
- Perfect for charging and seasonal maintenance of a 12.8V-13.2V LiFePO4 / LFP battery sized from 2 to 100 Amp-hour.
- SAVE : Low Volt Start of 0.5V + 3-step low volt SAVE and TEST; CHARGING AMPS: 5A (AmpMatic).
- IDEAL FOR: LiFePO4 (LFP) 4 series batteries from 2 – 100Ah; INPUT: Global (100-240V 50-60Hz), high efficiency (CEC listed), fully sealed.
- USE: Indoor / Outdoor (lowest temperature: -40°F / -40°C); STYLE: Weatherproof case with wall mounts, with 6ft / 180cm AC supply lead and 6ft / 180cm charge lead ending in SAE connector; Weatherproof battery lead & standard battery clip set included.
OptiMate™ lithium, the first OptiMate to protect your LiFePO4 battery in a way no other charger did before!
The new OptiMate lithium will protect your investment and guarantee your Lithium Iron Phosphate (LiFePO4 / LFP) battery will perform as advertised for a very long time.
With 5 Amps of charge current available OptiMate lithium unique multi step
ampmaticTM program recharges and balances cells within the battery quickly and efficiently.
OptiMate lithium’s maintenance program delivers current to the vehicle circuitry, protecting and keeping the battery at 100% charge.
OptiMate lithium – Battery Performance Guaranteed!
How it works
- Pre-qualification test: OptiMate Lithium displays the condition of the battery before charging and measures environment temperature. The ampmatic™ charge program is selected according to temperature and battery condition.
- Low Volts recovery: The safeTº protection mode controls charging during this sensitive battery SAVE stage, to ensure that an over discharged battery will be correctly and safely recovered. Tests are conducted through-out the SAVE program to determine if the battery has successfully recovered and can advance to BULK CHARGE.
- Bulk charge: the ampmatic™ processor actively adjusts charge current to match battery capacity and condition, achieving a complete charge in the shortest time. Progress is tracked against the ideal charge curve for LiFePO4 batteries.
- Short-circuited / dead cell check: Charge progress is tracked against the ideal LiFePO4 charge curve, internal damage will be detected and unnecessary charging is prevented of a battery that cannot be recovered.
- Absorption and equalization: for 10 minutes the current is delivered in pulses with voltage controlled between 14,0 and 14,3V, aiding cell voltage equalization and improving the battery’s overall power delivery.
- Charge verification: the voltage is limited at 13,6V while the ampmaticTM processor monitors the current absorbed by the battery. If this reveals a less than optimal charge, the program reverts to absorption for a further 10 minutes.
- Voltage retention test: is conducted for 30 minutes during which no charge current is delivered, with 5 possible test results indicating the battery’s general state of health. A green (voltage > 12,7V) result extends the test up to 12 hours, to check for excessive self discharge or higher than expected power loss through the vehicle’s electrical system.
Charge maintenance: The 12 hour MAINTENANCE CHARGE CYCLE consists of 30 minute float charge periods at a voltage of 13,6V followed by and alternating with a 30 minute ‘rest’ (no charge current) periods. During the float charge period current is delivered only if the battery has lost charge due to connected vehicle circuitry. A refresh cycle may be performed if the charge level has dropped significantly. The voltage retention test and maintenance charge cycle will repeat 24 hours after the start of the very first test and continue to repeat for as long as the charger remains connected.
The alternating charge and ‘rest’ maintenance program protects the battery against over discharge by connected vehicle circuitry, making it ideal for indefinite and 100% safe long term maintenance charging.
EarthX Lithium Battery Charging
EarthX lithium batteries can sit on the shelf for up to a year without the need to charge it due to the low self discharge rate which is about 2% a month, compared to a lead acid battery which is approximately 30% per month. (If you have the battery in a vehicle that has a constant draw, such as a Harley, and you don’t ride for a month, you will need to put the battery on a charger). After a long time of no use, it is wise to check the voltage and if it is less than 13.28V, you should charge it before start attempt. Do not leave a battery, lead acid or lithium in a discharged state or the cells will be permanently damaged. Charge immediately if this happens.
In the event you have to charge the battery, use a Lithium (LiFePO4) battery charger or a lead-acid battery charger that does not charge above 14.6V, will automatically turns off when the battery is fully charged (based on volts) and does not have a de-sulfate mode/deep conditioning mode/pulse mode (these can all mean the same thing, it just depends on your charger manufacturer the terminology they choose). Do not use any charger with voltage that pulses above 15V! This will damage the battery. If in doubt, consult the manual that comes with your charger.
The table below shows a list of chargers, and specifically indicates chargers that will work for recharging an “over-discharged” battery. This is not an all inclusive list:
As with any battery you are charging, follow these safety tips:
- Never leave the battery unattended when recharging it.
- When charging a battery, place it on a non-flammable, and remove any flammable items nearby.
- Unplug chargers always after the battery reaches full charge.
- Disconnect chargers from electrical outlets when these are not in use.
For chargers with a maintenance mode, the maintenance mode voltage should be 13.3V – 13.9V. For example, the Battery Tender JR has a maintenance mode voltage of 13.3V which is compatible, whereas the original Battery Tender or Battery Tender Plus has a maintenance mode voltage of 13.2V which is too low for a lithium battery. Please read the manual that comes with your charger.
EarthX Lithium batteries have an internal Battery Management System (BMS) to disconnect the battery from the load (your vehicle) if the battery is drained too low. When the battery is “disconnected”, there is no voltage at the battery terminal. Note, some volt-meters may read a small voltage. The EarthX over-discharge protection circuit is automatically reset when a charging current/voltage is present at the battery terminals (referred to as BMS Reset). Or if you have an EarthX battery manufactured after 2017, simply disconnect the negative terminal from the vehicle and it will reset itself and then you put it on a charger. (On the backside of the negative terminal there is a letter and a number, if this number is a 7 or higher, you have this feature built in)
If your battery reads near 0 volts, the over-discharge feature has been activated, thus your battery must be charged. If you left your lights on, key on, have a faulty stator, or have a parasitic drain this can easily happen. Our BMS is designed to disconnect the flow of current in the event of over-discharge (internal disconnect switch is opened). Many smart chargers will not attempt to charge a low voltage battery (below 9V). If this happens, there are several ways to charge the battery.
- The easiest way is if you have a charger such as the Optimate lithium charger or one that will engage even if the battery is in this protection mode. Simply connect the alligator clips first, plug in the charger next, and the save mode will come on and start charging it.
- Another method is to connect your charger to the EarthX battery as normal, then put either a jump pack or another 12V charged battery in parallel with the EarthX battery so the charger will read it’s voltage and engage. Once the charger sees voltage it begins to charge as normal. After 5-20 seconds you can remove the jump pack or jumper cables (being careful not to disconnect the charger). Recharging this battery from the depleted state can take from a couple hours to overnight.
- If the battery will not reset and charge after attempting either 1 or 2 above, you could have a damaged cell so do not continue to attempt to use or charge the battery. Do not attempt to charge a battery that is swollen in appearance. Do not attempt to jump start a battery that is swollen in appearance.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.