| Common forklift voltage configurations | 24V, 36V, 48V, 72V and 80V | 24V, 36V and 48V; higher voltages are available in modular packs | 24V, 36V and 48V; higher voltages are less common | 24V, 36V, 48V, 72V and 80V; modular systems can cover other voltage classes | 24V, 36V, 48V, 72V and 80V; application-specific pack design is common |
| Typical usable depth of discharge | Approximately 70–80%; deeper discharge can significantly reduce service life | Approximately 70–80%; avoid repeated full discharge | Approximately 70–80%; sensitive to over-discharge and improper charging | Approximately 80–95%, subject to the battery-management-system limits | Approximately 80–95%, subject to the battery-management-system limits |
| Typical round-trip energy efficiency | Approximately 75–85% | Approximately 75–85% | Approximately 75–85% | Approximately 90–97% | Approximately 90–97% |
| Typical cycle life at appropriate operating conditions | Approximately 1,200–1,800 cycles | Approximately 500–1,200 cycles | Approximately 800–1,500 cycles | Approximately 3,000–7,000 cycles | Approximately 1,500–3,000 cycles |
| Runtime per charge | Usually one standard shift; a spare battery may be needed for multi-shift operation | Usually one standard shift; runtime decreases under high-current or heavy-load duty | Usually one standard shift; best suited to moderate-duty applications | Often one to two shifts depending on pack size; consistent voltage supports stable performance | Often one to two shifts; high power-to-weight ratio supports demanding duty cycles |
| Opportunity charging suitability | Limited Frequent partial charging can cause sulfation and shorten life unless the charging profile is specifically designed for it. | Limited Less electrolyte maintenance, but repeated opportunity charging is still not ideal. | Limited Requires carefully controlled charging to avoid overcharge and gas accumulation. | Excellent Designed for frequent partial charging when the BMS and charger are correctly matched. | Excellent Suitable for high-utilization fleets with properly controlled charging and thermal protection. |
| Typical recharge time | Approximately 6–10 hours, followed by a cooling period | Approximately 6–10 hours; charging speed depends on pack design and heat control | Approximately 8–12 hours; conservative charging helps protect service life | Approximately 1.5–3 hours with a compatible high-rate charger; slower charging extends battery life | Approximately 1–3 hours with a compatible high-rate charger; thermal management is important |
| Charging infrastructure requirement | Ventilated charging room, compatible charger, watering equipment and spill-control procedures | Ventilated area and compatible charger; no routine watering | Ventilated area and compatible charger; no routine watering | Dedicated lithium-ion charger, battery-management system, communication interface and suitable electrical protection | Dedicated lithium-ion charger, battery-management system, thermal monitoring and suitable electrical protection |
| Routine maintenance | Watering with approved water, cleaning, equalization charging and inspection for corrosion | Low maintenance; inspect terminals, casing and charging performance | Low maintenance; inspect terminals, casing and charging performance | Very low No watering or equalization; periodic inspection and BMS diagnostics are required. | Very low No watering or equalization; periodic inspection and BMS diagnostics are required. |
| Cold-climate performance | Capacity and charging acceptance decline at low temperatures; charging a frozen battery can cause damage | Capacity declines in cold conditions; controlled charging is required | Capacity declines in cold conditions; charging below the approved temperature range should be avoided | Good discharge performance with thermal control; charging below 0°C generally requires heating or a charge lockout | Good power performance with thermal control; low-temperature charging protection is essential |
| Hot-climate performance | High heat accelerates water loss, corrosion and plate degradation; ventilation is important | Heat can accelerate aging and reduce service life; temperature control is recommended | Heat can accelerate aging and drying; avoid prolonged exposure to high ambient temperatures | Good performance with thermal monitoring; prolonged high temperature can accelerate cell aging | Good power performance with thermal monitoring; high temperature affects life and safety margins |
| Water and dust exposure | Use a protected battery compartment; electrolyte and corrosion controls are necessary | Sealed construction reduces leakage risk, but the pack still requires suitable enclosure protection | Sealed construction reduces leakage risk, but the pack still requires suitable enclosure protection | Specify enclosure protection appropriate to the truck environment, commonly IP54 or higher for exposed applications | Specify enclosure protection appropriate to the truck environment, commonly IP54 or higher for exposed applications |
| Energy density by weight | Low; typically about 30–40 Wh/kg at cell level | Low; typically about 30–40 Wh/kg at cell level | Low; typically about 30–40 Wh/kg at cell level | Medium; typically about 90–160 Wh/kg at cell level | High; typically about 150–250 Wh/kg at cell level |
| Safety profile | Well-established technology; hydrogen generation during charging requires ventilation and ignition control | Reduced electrolyte-spill risk; charging still requires ventilation and correct temperature control | Reduced electrolyte-spill risk; incorrect charging can cause heat and pressure buildup | Strong thermal stability compared with many other lithium chemistries; BMS, fusing and certified integration remain essential | High energy density; robust cell monitoring, thermal management and certified pack protection are essential |
| Initial purchase cost | Low | Low to medium | Low to medium | Medium to high | High |
| Expected total cost of ownership | Low for single-shift, low-utilization fleets; labor, charging losses, spare batteries and replacement frequency can increase lifecycle cost | Low to medium; may be attractive where spill reduction is important but opportunity charging is not required | Low to medium; suitable for moderate duty where maintenance reduction is valued | Often low for multi-shift, high-utilization fleets because of lower maintenance, higher efficiency and reduced battery swapping | Potentially competitive for applications requiring low weight, high power or long runtime; cell replacement cost can be significant |
| Best-fit operating profile | Single-shift warehouses, outdoor yards, cost-sensitive fleets and operations with battery-changing facilities | Light-to-medium duty, cleaner indoor environments and fleets seeking reduced watering requirements | Moderate-duty indoor applications where low maintenance and sealed construction are priorities | Multi-shift warehouses, cold-chain logistics, intensive distribution and fleets using opportunity charging | Weight-sensitive equipment, high-power applications and operations requiring high energy density |