How Long to Charge a Cordless Hedge Trimmer Battery (55V, 4Ah)?
Charging a Cordless Hedge Trimmer Battery (55V, 4Ah) from empty to full takes about 4 h 26 min with its standard 70W charger. The battery holds roughly 220 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 Hedge Trimmer Battery (55V, 4Ah)
Estimated charge time
4 h 26 min
Includes the slower li-ion taper phase above 80%.
Charge time by charger wattage
| Charger | Power | Full charge (0-100%) |
|---|---|---|
| Standard charger | 50W | 6 h 13 min |
| Fast charger | 70W | 4 h 26 min |
| Rapid charger | 110W | 2 h 49 min |
Battery capacity: 220 Wh · Chemistry: li-ion
Seasonal tools like this one often sit unused between projects, so a standard charger overnight is usually enough; a fast charger mainly helps when you need the tool again the same day.
Plan for a few hours on a standard charger, or roughly half that with a fast charger.
With the fastest charger listed here (Rapid charger, 110W) it takes about 2 h 49 min. With the slowest (Standard charger, 50W) it takes about 6 h 13 min. A 55V lithium-ion battery ideal for mid-to-large cordless hedge trimmer models.
Frequently asked questions
- How long does it take to charge a Cordless Hedge Trimmer Battery (55V, 4Ah)?
- From 0% to 100% with the standard 70W charger, it takes about 4 h 26 min. Using a faster charger shortens that; using a weaker one extends it, see the table above for exact numbers.
- Can I use a higher-wattage charger to charge it faster?
- Yes, as long as the charger is compatible with the device's connector and voltage. The battery's own charge controller limits how much current it accepts, so a more powerful charger reduces time mainly in the 0-80% range; above 80% lithium-ion packs taper the charge rate for safety regardless of charger wattage.
- Why does charging slow down near the end?
- Lithium-ion batteries charge at full power up to about 80%, then switch to a slower "taper" phase that protects the cells from stress at high voltage. That's why the last 20% often takes nearly as long as the first 80%.
- How is this charge time calculated?
- We divide the energy needed (220 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.