| Battery chemistry | Compare flooded lead-acid, sealed lead-acid, and lithium-ion options against the truck, shift pattern, charging access, maintenance resources, and total cost of ownership. | Lead-acid batteries require appropriate charging and, for flooded types, regular electrolyte-level checks. Lithium-ion batteries use a battery management system (BMS) and require compatible charging equipment. | Cell or battery datasheet, chemistry specification, operating manual, maintenance instructions, and a written explanation of application suitability. |
| Voltage and truck compatibility | Check that nominal voltage, connector, polarity, dimensions, cable arrangement, and battery weight meet the forklift manufacturer’s requirements. | Industrial forklift battery systems commonly use nominal voltages such as 24 V, 36 V, 48 V, 72 V, or 80 V. The correct configuration depends on the truck model. | Truck compatibility confirmation, dimensioned battery drawing, connector details, and rated-voltage specification. |
| Capacity and runtime | Compare capacity at the same stated rating method and discharge conditions. Estimate runtime from the truck’s duty cycle rather than capacity alone. | Capacity is commonly expressed in ampere-hours (Ah). Lead-acid capacity ratings may use a specified discharge rate, such as the five-hour rate (C5); ratings at different rates are not directly interchangeable. | Datasheet showing Ah rating, rating rate, discharge conditions, usable-capacity assumptions, and any application-specific runtime estimate. |
| Battery dimensions and weight | Confirm the battery fits the truck compartment and meets the truck’s required minimum and maximum battery weight. | Compartment dimensions and minimum battery weight vary by forklift model. A battery that is too light or incorrectly sized can affect fit and safe operation. | Dimensioned outline drawing, finished-battery weight, lifting-point information, and written confirmation against the truck specifications. |
| Charging time and charger match | Compare charging duration, charger power, charging profile, connector, and whether the battery supports the intended charging schedule. | Charging time depends on chemistry, capacity, charger output, initial state of charge, temperature, and charging limits. Lead-acid batteries generally need a full charging cycle and appropriate cooling; opportunity charging is chemistry- and system-dependent. | Compatible charger specifications, charging profile, recommended operating procedure, and written guidance on charging frequency and cooling requirements. |
| Cycle life and operating conditions | Compare cycle-life claims only when depth of discharge, temperature, charging method, and end-of-life definition are stated consistently. | Cycle life is not a fixed value: it changes with operating temperature, discharge depth, charge practice, and maintenance. Request the test conditions behind any quoted figure. | Cycle-life test report or test protocol, stated end-of-life capacity threshold, and operating-condition assumptions. |
| Safety and protection | Review protections against electrical faults and confirm safe handling, installation, ventilation, and emergency procedures for the selected chemistry. | For lithium-ion systems, review BMS functions and fault responses. For lead-acid systems, assess charging-area ventilation and procedures for electrolyte and hydrogen hazards where applicable. | Safety data sheet, installation and emergency guidance, protection-function list, and relevant test or conformity documentation for the specific product. |
| Standards and testing | Check that standards and certificates apply to the offered battery model and intended application, not merely to a component or different product. | IEC 60254 covers lead-acid traction batteries. For industrial lithium batteries, buyers may encounter IEC 62619; applicability depends on the product and market requirements. | Test reports, certificates with model identification, issuing-body details, and a list of standards claimed for the offered configuration. |
| Warranty and service support | Compare coverage period, capacity-retention terms, exclusions, claim process, service response, and availability of replacement parts. | Warranty terms vary by product and supplier. Review calendar duration and any usage, cycle, temperature, or charging limits rather than comparing duration alone. | Full written warranty, claim procedure, service contact details, spare-parts policy, and support arrangements for the destination country. |
| Export packaging and transport | Confirm packaging, handling instructions, shipping classification, and required transport documents for the specific battery chemistry and shipment route. | Lithium batteries may be subject to dangerous-goods transport rules, including applicable UN requirements. Classification and documentation depend on battery type, configuration, and mode of transport. | Applicable transport test summary or classification documents, packaging details, safety data sheet, and shipment documentation confirmed by the shipper or freight forwarder. |
| Quotation transparency | Compare quotations on the same configuration, capacity rating, included accessories, delivery terms, warranty, and after-sales scope. | A meaningful comparison identifies the exact battery model and configuration and separates product, charger, freight, duties, and service costs. | Itemized quotation, technical specification, delivery terms, lead time, included accessories, and confirmation of any additional charges. |