Which battery type lasts longest?

Flooded tubular OPzS has the longest design life, typically 15 to 20 years at 20 degrees Celsius, followed by OPzV and lithium iron phosphate at 10 to 15 years. VRLA AGM sits at 5 to 12 years depending on grade. Real life depends far more on temperature and float voltage than on the label.

Should I choose lithium or lead acid?

Lithium iron phosphate wins where cycling is daily, space and weight are limited, or high recharge rates matter. Lead acid remains the economical choice for pure standby duty with rare discharges, and it tolerates a wider range of installed conditions with simpler protection.

How do you size a battery string?

From four inputs: the load in kilowatts or amperes, the required autonomy in minutes or hours, the system voltage, and the minimum end voltage the load accepts. Temperature, ageing margin, and future load growth are then applied before selecting a capacity.

Products / Battery Technologies

Industrial batteries

VRLA, flooded, TPPL and lithium batteries, chosen for the duty cycle of the site.

VRLA (AGM / GEL)

Sealed lead-acid for standby duty.

Valve-regulated AGM and GEL batteries for UPS strings, telecom cabinets, and substation control rooms. Maintenance-free, upright or side-mount, sized for the required autonomy.

AGMGELUPS stringsTelecom cabinets

Flooded lead-acid

Long service life for utility and heavy standby.

OPzS and OPzV vented cells for substation batteries, switchgear tripping supplies, and long-autonomy DC plants. Twenty-year design life when maintained correctly.

OPzS / OPzVSubstation DC20-year design life

TPPL

Thin-plate pure lead for cycling and PSoC.

Thin-plate pure lead where high cycling, partial state of charge operation, fast recharge, or a small footprint decide the design. Delivered as front-terminal and cabinet solutions, engineered by EXBATT around proven manufacturer platforms.

High cyclingPartial state of chargeFast recharge

Lithium-ion

Lithium where weight, cycles, or footprint decide.

Rack and cabinet lithium systems with integrated BMS for telecom, C&I, and hybrid sites. Chemistry, thermal design, and BMS chosen to match the site, not a one-size-fits-all SKU.

Rack systemsIntegrated BMSHybrid sites

Technology partners

Curated manufacturers, one accountable engineering partner.

EXBATT chooses the platform that fits the case. We partner with a curated group of established battery and power electronics manufacturers, and we size, install, test and maintain every system under our own engineering accountability: duty cycle, temperature, autonomy, footprint, and total cost of ownership.

Technology chosen per case, not per catalog
Established manufacturers, verified quality
Single point of engineering accountability

Lifecycle

Specified, installed, tested, maintained.

Sizing based on autonomy, temperature, and load profile. Installation and commissioning to manufacturer spec. Impedance and load-bank testing throughout life. End-of-life removal handled responsibly.

Autonomy and load studies
Commissioning to manufacturer spec
Scheduled impedance and load-bank tests
Compliant end-of-life removal

Frequently asked

Which battery type lasts longest?: Flooded tubular OPzS has the longest design life, typically 15 to 20 years at 20 degrees Celsius, followed by OPzV and lithium iron phosphate at 10 to 15 years. VRLA AGM sits at 5 to 12 years depending on grade. Real life depends far more on temperature and float voltage than on the label.
Should I choose lithium or lead acid?: Lithium iron phosphate wins where cycling is daily, space and weight are limited, or high recharge rates matter. Lead acid remains the economical choice for pure standby duty with rare discharges, and it tolerates a wider range of installed conditions with simpler protection.
How do you size a battery string?: From four inputs: the load in kilowatts or amperes, the required autonomy in minutes or hours, the system voltage, and the minimum end voltage the load accepts. Temperature, ageing margin, and future load growth are then applied before selecting a capacity.

Last reviewed: September 2026

Not sure which fits?

Tell us the load, the site, and the constraints. We'll size the right system.