New 20 Year Drop In Replacement Lithium (LiFePO4) Batteries Work With Most UPS Brands February 06 2018, 3 Comments

UPDATE: Now tested and proven to work in APC, Eaton, and CyberPower brand UPS systems. 

BBP Purchase Link: https://www.backupbatterypower.com/collections/batteries/products/high-discharge-rate-lithium-lifepo4-battery-12-volts-7-2-amp-hours 

Amazon Purchase Link: https://www.amazon.com/dp/B07BHW61MG

After 3 years in research and development, Battery Backup Power, Inc. has released a 10-20 year Lithium (LiFePO4) battery that is a successful drop in replacement battery for most brands of UPS systems including APC, CyberPower, Eaton, and Battery Backup Power, Inc. itself. 

UPS With Original Lead Acid Batteries
UPS With Original Lead Acid Batteries

The first and second generations of drop in replacement lithium batteries created by Battery Backup Power, Inc. were restricted by the discharge current. These were never sold on the market by Battery Backup Power, Inc., but are currently sold under other brands. This meant that they could not put out the same amperage or current as the lead acid batteries they were intended to replace.

UPS With Original Lead Acid Batteries Being Removed
UPS With Original Lead Acid Batteries Being Removed  

For example, the 1500 VA / 900 Watt UPS model in this article was originally designed with 3x Yuasa NPW36-12 12 Volt DC lead acid batteries wired in series of 3. The Yuasa NPW36-12 lead acid battery can support continuous discharge currents of 45 amps at 12 Volts DC (540 watts each). When these lead acid batteries are wired in series, the 3x batteries can support a continuous 36 Volt DC discharge at 45 amps (1,620 watts). That exceeds the 900 watt maximum load capacity of the UPS which is why the system was designed with these specific batteries. 

UPS With Lead Acid Battery Tray Removed
UPS With Lead Acid Battery Tray Removed

Generation 1 and 2 Lithium (LiFePO4) batteries could only support a continuous discharge current of 15 amps (generation 1 with 180 watts) or 27 amps (generation 2 with 324 watts) per battery. If these batteries were used in a UPS designed with 45 amp 12 volt lead acid batteries, the UPS maximum output would be restricted to a lower wattage. 

UPS Battery Tray With Original Lead Acid Batteries Wired In Series (36 Volts DC)
UPS Battery Tray With Original Lead Acid Batteries
Wired In Series (36 Volts DC)

Generation 1 Lithium (LiFePO4) batteries wired in series of 3 would be restricted to 15 amps at 36 volts (540 watts). This would result in the UPS failing with loads greater than 540 watts when generation 1 Lithium (LiFePO4) batteries were used with this 1500 VA / 900 Watt UPS. 

Lithium (LiFePO4) Replacement Batteries Being Unpacked
Lithium (LiFePO4) Replacement Batteries Being Unpacked

Generation 2 Lithium (LiFePO4) batteries wired in series of 3 would be restricted to 27 amps at 36 volts (972 watts). For this particular UPS model/design, this would result in the UPS working normally when generation 2 Lithium (LiFePO4) batteries were used and the continuous load stayed below 900 watts. The over-current protection built into this 1500 VA / 900 Watt UPS would fail because it is set to 125% for a few seconds (1,100 watts).

Lithium (LiFePO4) Batteries Loaded Into Battery Tray
Lithium (LiFePO4) Batteries Loaded Into Battery Tray

Using Generation 3 Lithium (LiFePO4) batteries, the UPS functions normally and will last approximately 10-20 years (2,000 cycles). For more information or to purchase Lithium (LiFePO4) drop in replacement batteries, please click here

Lithium (LiFePO4) Batteries In Battery Tray Loaded Into UPS
Lithium (LiFePO4) Batteries In Battery Tray Loaded Into UPS

 

UPS Powered On With Lithium (LiFePO4) Replacement Batteries
UPS Powered On With Lithium (LiFePO4) Replacement Batteries

 

UPS With Lithium (LiFePO4) Replacement Batteries Completely Re-Assembled
UPS With Lithium (LiFePO4) Replacement Batteries
Completely Re-Assembled 

 

New Replace Battery Date Of January 2028 Added To Case
New Replace Battery Date Of January 2028 Added To Case 

 

UPS With Replacement Lithium (LiFePO4) Batteries Undergoing Output Voltage Testing
UPS With Replacement Lithium (LiFePO4) Batteries
Undergoing Output Voltage Testing