The 72V 20A adjustable charger is a smart battery charger built for 20s lithium-ion packs. It fits Sur-Ron and Talaria electric dirt bikes, other e-motorcycles, e-bikes and electric scooters. The charger brings a 72 V class pack up to roughly 84 V at full charge. Charging current is user-selectable up to 20 A.
In battery terms, 20s means twenty cells wired in series. This is exactly the configuration used in Sur-Ron Light Bee and Talaria Sting class machines. Therefore the charger suits more than e-bikes alone. It also handles heavier, faster electric vehicles running the same pack architecture.
At the 20 A setting and around 84 V, output power reaches approximately 1.6-1.7 kW. As a result, it works several times faster than the typical 3-5 A charger supplied with most machines. A built-in cooling fan holds a stable temperature through the whole cycle. Meanwhile the display reports voltage, current and charge level in real time.
Key Benefits
- Adjustable charging current up to 20 A – you set the current yourself, based on what your pack allows and the charging mode you want.
- Fast charging – the maximum 20 A setting refills a 72 V pack considerably quicker than a standard charger.
- Longevity mode – a lower current setting is gentler on the cells and extends overall battery service life.
- Informative display – voltage (V), current (A) and charge percentage are shown live during the cycle.
- Active cooling – the integrated fan prevents the unit from overheating while it works at high power.
- Accurate 20s lithium-ion voltage – the cycle finishes at roughly 84 V, which matches 20 × 4.2 V.
- Connector matched to your vehicle – you specify the charging plug type in your order comments.
- Simple operation – connect it, set the current and watch the status on screen.
Who Is This Charger For?
This charger is intended for Sur-Ron and Talaria electric dirt bikes, including Sur-Ron Light Bee and Talaria Sting models. It also serves other e-motorcycles, electric bicycles and electric scooters. The single requirement is a 20s (72 V class) lithium-ion battery on board.
Daily riders benefit most when a pack must be refilled quickly between trips. Likewise, it earns its place at the track or at an event, where the gap between runs is short. Builders who assemble their own battery packs also choose it, since the current can be matched to a specific BMS limit.
Before selecting the full 20 A, confirm that your battery management system permits that current. If it does not, simply dial in a lower value and charge at a safe rate.
What’s in the Box
- 72V 20A adjustable charger with display and cooling fan
- Charging connector according to the model stated in your order
Technical Specifications
| Product type | Smart battery charger |
| Battery voltage | 72 V class, 20s (20 cells in series) |
| Cell chemistry | Lithium-ion (Li-ion) |
| Fully charged pack voltage | ~84 V |
| Output current | Up to 20 A, adjustable |
| Approximate output power | 1.6-1.7 kW at 20 A |
| Display | Voltage (V), current (A), charge level (%) |
| Cooling | Active, fan assisted |
| Charging connector | According to the model stated in your order |
| Compatible vehicles | Sur-Ron, Talaria, e-motorcycles, electric bikes, electric scooters |
Why Choose This Charger
Standard chargers ship with a fixed current, so choosing your charging speed is simply not possible. Here you change the current yourself. You can move from an economical, cell-friendly rate all the way up to 20 A. Consequently one device covers the job of two separate chargers.
The screen shows exact voltage and current, so you read the real state of the pack. You are not guessing from the colour of a single LED. That level of detail matters when you maintain 20s packs, whose full voltage sits at roughly 84 V. Small deviations become visible immediately.
The charging connector is made to suit your vehicle, so hunting for adapters is unnecessary. Just state your model in the order comments and the correct plug is fitted.
Frequently Asked Questions
Will this charger work with a Sur-Ron or Talaria battery?
- Yes, provided the machine carries a 20s (72 V class) lithium-ion pack.
- Sur-Ron and Talaria electric dirt bikes normally use exactly this 20s configuration.
- Sur-Ron Light Bee and Talaria Sting class bikes are covered.
Which other vehicles is it compatible with?
- Other e-motorcycles built around 20s lithium-ion packs.
- Electric bicycles with a 72 V class battery.
- Electric scooters running the same 20s architecture.
How fast does it charge compared with a stock charger?
- At 20 A and roughly 84 V, output reaches about 1.6-1.7 kW.
- That is several times the power of a typical 3-5 A charger.
- Lower settings trade speed for gentler treatment of the cells.
Can I use it if my BMS limits charging current?
- Yes. Set a value below your BMS limit before starting the cycle.
- Always check the permitted current before selecting the full 20 A.
- Pack builders often use this feature to match a specific BMS.
What does the display show?
- Live voltage in volts.
- Live charging current in amps.
- Charge level as a percentage.
At what voltage does charging stop?
- The cycle completes at approximately 84 V.
- This corresponds to 20 cells × 4.2 V.
Does it get hot during fast charging?
- An internal fan provides active cooling throughout the cycle.
- Temperature stays stable even at high power settings.
Which charging connector will I receive?
- The plug is supplied to match the model you name in your order comments.
- No separate adapter is required afterwards.
One charger, two roles: rapid refills when time is short and a gentle, low-current cycle when battery life matters more. With live readings on screen, active cooling and a plug matched to your Sur-Ron, Talaria or other 20s machine, it replaces the guesswork of a stock unit with real control.
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