How Long to Charge a Cordless Chainsaw (36V, 5Ah)?
Charging a Cordless Chainsaw (36V, 5Ah) from empty to full takes about 3 h 55 min with its standard 65W charger. The battery holds roughly 180 Wh, and this page estimates the time for every common charger wattage, using the Lithium-ion (Li-ion / Li-Po) chemistry it actually uses.
Charge time calculator for Cordless Chainsaw (36V, 5Ah)
Estimated charge time
3 h 55 min
Includes the slower li-ion taper phase above 80%.
Charge time by charger wattage
| Charger | Power | Full charge (0-100%) |
|---|---|---|
| Standard charger | 65W | 3 h 55 min |
| Fast charger | 130W | 1 h 57 min |
| Ultra fast charger | 195W | 1 h 18 min |
Battery capacity: 180 Wh · Chemistry: li-ion
The dual-cell architecture of this cordless chainsaw means you're distributing cutting demands across two independent lithium-ion batteries, effectively extending your uninterrupted runtime in the field. Unlike single-battery designs, this redundancy keeps one pack fresh as a backup when the primary cell depletes during intensive cutting sessions—a practical advantage when you're deep into limb trimming or stacking firewood and can't afford downtime. The lithium-ion chemistry responds well to this dual-pack system, as each cell manages thermal load more efficiently than a single oversized battery would, reducing stress on the cells and supporting their long-term health.
Charging behavior with a dual-cell setup warrants a deliberate routine: rotate which pack you prioritize after each use, allowing the recently-depleted cell to rest before its next charge cycle. This counterintuitive practice—letting a spent battery sit briefly before plugging it in—helps stabilize the lithium-ion chemistry and prevents thermal spikes during the initial charging phase. Store both packs in a cool, dry location when the chainsaw is shelved for weeks, as lithium-ion cells drift slowly in idle conditions; a quick charge before seasonal use ensures both batteries perform at their peak and syncs their charge states so neither one becomes a weak link during cutting.
With the fastest charger listed here (Ultra fast charger, 195W) it takes about 1 h 18 min. With the slowest (Standard charger, 65W) it takes about 3 h 55 min. A cordless chainsaw runs on dual cells to deliver cutting power comparable to gas models while eliminating emissions and maintenance.
Frequently asked questions
- How long does it take to charge a Cordless Chainsaw (36V, 5Ah)?
- From 0% to 100% with the standard 65W charger, it takes about 3 h 55 min. Using a faster charger shortens that; using a weaker one extends it, see the table above for exact numbers.
- Should I always keep both batteries fully charged, or is there a smarter way to manage them long-term?
- For maximum lifespan with lithium-ion cells, avoid keeping both packs at full charge indefinitely. Instead, use one battery, let it rest for a few hours, then charge it the next time you plan to cut—this cycle reduces chemical stress on the cells. The second battery can stay topped up as your emergency backup. Rotating between them every few uses distributes wear evenly and keeps your cordless chainsaw ready to go whenever you need it, without sacrificing either battery's longevity.
- What's the best way to store this chainsaw if I won't use it for months?
- Drain both batteries to roughly half their capacity before putting the chainsaw away, then store the packs separately from the saw in a temperature-stable location—a garage or shed without extreme heat or cold works best. Lithium-ion chemistry is sensitive to both overcharge and deep discharge during dormancy, so the half-capacity state is the sweet spot for minimal degradation. When you're ready to cut again, charge both cells to full before your first session to ensure balanced performance between the dual-cell system.
- How is this charge time calculated?
- We divide the energy needed (180 Wh times the percentage you're charging) by the charger's effective power, which is the charger's wattage times the battery chemistry's real-world charging efficiency (85% for Lithium-ion (Li-ion / Li-Po)). The same formula powers both this page and our API.
ChargeTimeCalculatorestimates are based on typical charger efficiency and battery chemistry, not a live connection to your device. Always follow your manufacturer's charging guidance.