The 36V 18-125-17 Clark TM20 XtraPower battery is a specialized 36-volt traction battery designed for Clark material handling equipment. While specific listings for this model aren’t currently available through standard channels, Clark-compatible alternatives typically use lead-acid or lithium-ion chemistries with capacities ranging 100-400Ah. For the TM20 series, verify terminal configuration (likely DIN/SAE posts) and dimensions (~510x240x290mm) to ensure compartment compatibility.
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What are the key specs for Clark TM20 batteries?
The Clark TM20 requires 36V DC systems with discharge rates >5C for intensive warehouse operations. Standard configurations use 18-cell lead-acid blocks (2V/cell) totaling 36V, with plate thickness ≥4mm for 1,200+ cycles at 80% DOD.
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Beyond voltage requirements, the TM20’s battery compartment demands precise measurements: 125cm length tolerance ±0.5cm and 17cm terminal height. Lithium-ion upgrades now offer 30% weight reduction through aluminum casing – a typical 36V 210Ah LiFePO4 pack weighs 148kg versus 220kg for equivalent lead-acid. Pro Tip: Always verify the battery’s intercell connector type – mismatched busbars can cause voltage drop during peak loads. For instance, a TM20 running 8-hour shifts needs ≥280Ah capacity to avoid midday recharge cycles.
How does capacity affect TM20 performance?
Runtime scales directly with Ah rating – a 36V 400Ah battery provides 26% longer shift times than 320Ah models. However, weight increases 85kg, requiring counterbalance adjustments.
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Practical capacity selection depends on duty cycles: batteries under 250Ah suit single-shift operations (5-6 hours), while 400+Ah units support multi-shift logistics. Lithium variants maintain voltage stability better – while lead-acid drops to 31V under load, LiFePO4 stays above 34V, preserving hydraulic response times. Transitionally, warehouses using 48V systems often retrofit TM20s with DC/DC converters, though this adds 7-12% energy loss.
| Chemistry | Cycle Life | Cost/kWh |
|---|---|---|
| Lead-Acid | 1,200 | $150 |
| LiFePO4 | 3,500 | $320 |
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FAQs
Yes, provided they meet OEM voltage (±2V), dimensions (±1cm), and CCA specs (>850A). BMS integration is mandatory for lithium replacements.
How often should TM20 batteries be watered?
Lead-acid versions require monthly distilled water refills – lithium alternatives eliminate maintenance but need quarterly cell voltage checks.
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