72V Electric Scooter 84V 5A Battery Charger
20S packs sold as 72V charge to 84.0V; this unit does it at 5A. Voltage display, active PFC and GX16-3P output for 72V e-bikes, e-scooters and light electric...
| Input Voltage | 100-240V AC |
|---|---|
| Output | 84V 5A |
| Efficiency | >88% |
| Protection | OVP/OCP/SCP/OTP |
84V charger for 20S lithium packs — 74.0V nominal, 84.0V full charge, the pack most suppliers sell as a 72V battery. Voltage display, active PFC, built-in fan, GX16-3P output. Used on 72V e-bike, e-scooter and light electric vehicle packs. Built in our own 3,000 m² factory in Shenzhen since 2011.
Key specifications
Model / battery · YZ600 · 72V (20S) lithium-ion pack, 74.0V nominal
Output · 84.0 V DC / 5 A (420 W) · CC/CV · charging finish voltage 83.9–84.1 V
Output tolerance · 5 A rated · 4.8 A min / 5.2 A max · constant-current band holds 5 A from 50 V DC up to 82.0 V DC
Input · 100–240 V AC, 50/60 Hz rated (47–63 Hz range), 5.0 A max · appliance inlet (detachable mains cord)
Efficiency · >88%
Display · Voltage display on the case — shows the pack voltage during charge
Power factor · Active PFC
Protection · OVP · OCP (5.5 A max, auto-recovery) · SCP (below 0.1 Ω, auto-recovery) · OTP · overload | automatic cut-off when the pack is full | LED: red = charging, green = standby / charge complete
Cooling / enclosure · Built-in fan · fireproof ABS + PC housing · Class II (double insulated) · IP20 (indoor, not water-resistant)
Output connector · GX16-3P (12 mm) — other types below
Size / weight · approx. 205 × 100 × 58 mm · 0.9 kg
Environment · -20 °C to +50 °C operating · -40 °C to +80 °C storage · 25–90% RH non-condensing · up to 2,000 m altitude
Reliability / safety · MTBF ≥50,000 h (MIL-HDBK-217F, 25 °C full load) · leakage current ≤0.25 mA at 220 V AC/50 Hz · dielectric strength 1,500 V AC primary-to-secondary, <5 mA, 100% production tested
Certification · CE (LVD + EMC) · UKCA (LVD + EMC) · RoHS 2.0 — certificate and report numbers below
MOQ / lead time / warranty · 1 unit · 10-15 working days · 1 year
Check two things before you order: this is the 20S build — 84.0V is the full-charge voltage of a 20S lithium pack (74.0V nominal), the pack usually sold as 72V. A 16S 60V pack charges at 67.2V, a 17S pack at 71.4V, and 72V lead-acid needs a different profile again — this unit is not for lead-acid. Second, the connector: standard here is GX16-3P (12 mm), so compare it against your old charger's plug.
Full technical data sheet — complete specification, certification references, all connector and plug options, the series-count matrix and ordering terms. 2 pages, PDF.
Connector, plug and custom build options
Output connector · GX16-3P (12 mm) standard; also 3-pin XLR, DC 5.5 × 2.1 mm, DC 5.5 × 2.5 mm, GX12, XT30 / XT60 / XT90, Anderson-style, alligator clips — or a connector to your drawing
Pinout · Built to your equipment's wiring — tell us the pin assignment your pack expects and we will produce to that drawing
Input plug · US · EU · UK · AU
Label · cable length · packaging · manual · Produced to your specification
Since 2011 · 15 years building chargers
3,000 m² · own factory in Shenzhen
150,000+ · units produced every month
55+ · export markets served
Why this charger lasts
In CC mode the charger pushes a steady 5A into the pack until it reaches 84.0V, then switches to CV mode and holds that voltage while the current tapers. Charging stops when the pack is full, so the unit is safe to leave connected overnight — which is what a 20S pack in daily use actually needs.
Active cooling
A built-in fan moves air across the board and the radiating fins around it, so heat leaves through the shell by design. Some warmth on the case under a 5A load is normal.
FR-4 board
The PCB is FR-4: more solid welding, higher reliability, more stable under thermal cycling than the cheap board material used in low-cost chargers.
Voltage display
The display shows the pack voltage as it climbs, so the user can see charge state instead of guessing from a light.
Active PFC
Power factor correction keeps input current in phase with the mains, so the charger draws a clean, near-unity load instead of the spiky draw a cheap charger presents to the socket.
Six protection layers
OVP, OCP, SCP, OTP, overload protection and overcharge cut-off. Charging stops on a fault and resumes automatically once it clears.
1-year warranty. We build it, so we can stand behind it.
Certifications and how we build
CE — LVD 2014/35/EU · Test report ATJC247893828390485SR1 · EN IEC 60335-1:2023/A11:2023, EN 60335-2-29:2021/A1:2021/A11:2024 · family YZ420-xxxxyyyy, 3–108 VDC / 420 W max. CE marking is applied under the manufacturer's EU Declaration of Conformity.
CE — EMC 2014/30/EU · Test report ATJC24122180001900E · EN IEC 55014-1:2021, EN IEC 55014-2:2021, EN IEC 61000-3-2:2019/A1:2021/A2:2024, EN IEC 61000-3-3:2013/A1:2019/A2:2021
UKCA — UK LVD + UK EMC · LVD test report ATJC24122180001900SR1 · EMC certificate ATJC24122180001900EK · BS EN IEC 60335-1:2023/A11:2023, BS EN 60335-2-29:2021/A1:2021/A11:2024, BS EN IEC 55014-1:2021, BS EN IEC 55014-2:2021
Certified family · YZ420-xxxxyyyy — output voltage 3–108 VDC in 0.1 V steps, output current 0.1–8.0 A, output power 420 W max
RoHS 2.0 · Test report CRT250623R002 · Directive 2011/65/EU as amended by 2015/863/EU · IEC 62321 series · Pass
Own SMT lines, assembly zones, aging chambers and IQC / IPQC / OQC checkpoints sit under one roof; every unit is aged before packing, and your order runs through three inspections before we photograph it and dispatch. Certificate and test-report copies are available for your technical file on request.
Frequently asked questions
Are you a factory or a trading company?
We are a manufacturer. YZPOWER has designed, assembled and tested battery chargers in our own 3,000 m² factory in Shenzhen since 2011 — SMT lines, assembly zones, aging chambers and quality control all under one roof. OEM and ODM builds are welcome.
What battery does this charger suit?
A 20S lithium-ion pack — 74.0V nominal, 84.0V at full charge. These packs are sold as 72V packs, so go by the series count rather than the label: if your pack has 20 cells in series, its full-charge voltage is 84.0V and this is the charger. If you are not sure, tell us your pack's nominal voltage and full-charge voltage and we will confirm.
Is this the same thing as a 72V battery charger?
Yes. A 20S lithium pack is sold as a 72V pack — 74.0V nominal, 84.0V at full charge — so this is also the 72V lithium battery charger you want when you search for a 72V battery charger. Check the series count (20S) or the full-charge voltage on your old charger: if it says 84.0V, this is the one.
Will the connector fit my e-bike or scooter?
The standard output on this build is GX16-3P (12 mm). If your old charger uses a different plug — 3-pin XLR, DC 5.5 × 2.1 mm, XT60 and so on — we build the same charger with that connector, so send us a photo of the old plug or your pack's socket and we will match it. Connector mismatch is the single most common reason a replacement charger gets returned.
Can I use it on a 60V (16S) pack, a 60V LiFePO4 pack or a 72V lead-acid battery?
Not with this build. 84.0V is the full-charge voltage of a 20S pack; a 16S 60V lithium pack charges at 67.2V, a 20S LiFePO4 pack charges at 73.0V, and 72V lead-acid needs a different charging profile entirely. This unit is not for lead-acid. We build all of those versions on the same platform — same housing, fan, PFC and protections, different output voltage — so tell us your battery type and we will quote the right version. Ordering the wrong output voltage is the most common reason a replacement charger fails.
Does it stop charging when the battery is full?
Yes. When the pack reaches 84.0V the charger tapers the current, stops charging and holds the pack rather than continuing to push current into it, which is what protects a lithium pack from overcharging. Over-voltage, over-current, short-circuit, over-temperature and overload protections are all built in, and charging resumes automatically once a fault clears.
Related models
Other chargers built for the same battery system, from the same factory: