ZB 24V 3A Lead‑Acid Wheelchair Charger – purpose‑built for 24V lead‑acid batteries (AGM, Gel, Flooded) with capacity from 18Ah to 36Ah. With a constant output current of 3A, this charger reduces charging time by approximately 30‑40% compared to standard 2A chargers, while still fully preserving battery life. The optimized 3‑stage bulk‑absorption‑float algorithm ensures precise voltage control (27.2‑29.6V) and a 500±50mA transition threshold, preventing overcharge and water loss. Includes 12 interchangeable plugs, global safety certifications, and silent fanless design – ideal for larger wheelchairs, heavy‑duty mobility scooters, and floor cleaning machines.
One charger works worldwide – choose your plug at order.
Charges 18‑36Ah batteries 30‑40% faster than 2A chargers.
3‑stage bulk‑absorption‑float with 500mA transition for safe full charge.
Over‑current, over‑voltage, short‑circuit, reverse polarity, backflow, over‑temperature.
UL, CE, FCC, PSE, KC, CB, RoHS, IEC60601‑1, ISO7176‑31, UKCA.
Select Your Plug Type – Click any image to view full size
Technical Specifications
| Parameter | Value |
|---|---|
| Input Voltage | 100‑240V AC, 50/60Hz |
| Output Voltage (Lead‑Acid) | 27.2‑29.6V DC |
| Output Current | 3A max (faster than 2A) |
| Recommended Battery Capacity | 18Ah – 36Ah (larger than 2A version) |
| Efficiency | ≥90% |
| Pre‑charge (Trickle) Current | 1000±200mA (for deeply discharged batteries) |
| Transition Current (to float) | 500±50mA (higher than 2A’s 400mA) |
| Charging Stages | 3‑stage: Bulk → Absorption → Float |
| Cooling | Natural convection – fanless, silent |
| Housing Material | PC plastic, fire‑retardant |
| Dimensions (L×W×H) | 155×74×32mm |
| Net Weight | 465±5g |
| Output Connector | 3‑pin XLR male, 1200mm cable |
| Input Cord Lengths | US 1800mm, others 1300mm |
| Withstand Voltage | 4KV |
| Packing (Master Carton) | 25 pcs/carton (460×340×370mm) |
Fig.1: Dimensions for 2A/3A models (155×74×32mm)
Fig.2: Output connector – 3-pin XLR male, 1200mm cable
Lead‑Acid Specific 3‑Stage Charging with Higher Current
The ZB 24V 3A Lead‑Acid Charger follows the proven bulk → absorption → float profile, optimized for larger battery banks (18‑36Ah). The higher 3A current significantly reduces charging time while still respecting the battery’s maximum recommended charge rate (typically 0.1‑0.2C). For a 30Ah battery, the charger delivers:
- Bulk stage: Constant 3A current until voltage reaches absorption setpoint (≈28.8‑29.2V). This stage restores about 80‑90% of capacity and is 40% faster than a 2A charger.
- Absorption stage: Constant voltage with declining current. Once the current drops to 500±50mA (the transition threshold), the charger switches to float.
- Float stage: Maintains a safe voltage (≈27.2V) to keep the battery fully charged without overcharging, preventing water loss and plate sulfation.
For batteries that have been deeply discharged (voltage below 20V), the charger initiates a trickle pre‑charge at 1000±200mA to safely recover the battery before entering the bulk stage. This feature is crucial for batteries that have been left unused for weeks.
Using the correct 3A charger instead of a 2A charger can reduce charging time from over 10 hours to just 6‑7 hours for a typical 30Ah battery, greatly improving convenience for daily users.
Six‑Layer Protection System
- Over‑current protection – automatically limits output when current exceeds 3A threshold.
- Over‑voltage protection – stops charging when voltage exceeds 30V to avoid battery damage.
- Short‑circuit protection – instant output shutdown in case of accidental short.
- Reverse polarity protection – no output when battery is connected backwards; both charger and battery remain safe.
- Backflow / anti‑reverse current protection – prevents battery voltage from feeding back into the charger.
- Over‑temperature protection – reduces power or shuts down when internal temperature exceeds safe limit.
Global Certifications & Compliance
Our charger holds multiple international certificates: UL, CE, FCC, PSE, KC, CB, RoHS, IEC 60601‑1, ISO 7176‑31, and UKCA (for UK plug version). These attest to full compliance with safety, electromagnetic compatibility, and wheelchair‑specific electrical standards – giving wholesale buyers complete confidence and simplifying customs clearance.
Application & B2B Information
Ideal for: Larger electric wheelchairs, heavy‑duty mobility scooters, floor scrubbers, and light electric vehicles using 24V lead‑acid batteries with capacities 18‑36Ah. The 3A charger is ideal for users who require faster daily charging, such as rental fleets, hospitals, or individuals who use their wheelchair all day and have limited overnight charging windows.
Wholesale & Customization: Minimum Order Quantity (MOQ) is 25 pieces per type (mixed plug types allowed). OEM services include custom logo, packaging, and label language (English / Japanese / UKCA). Sample orders supported. Delivery: 15‑25 days after payment confirmation.
12‑Month Hassle‑Free Warranty: If any unit fails due to manufacturing defect within warranty, provide a short video or photo as proof. We will credit the failed quantity on your next order – no need to return defective units, saving you return shipping costs and downtime.
Nameplate languages: English, Japanese, or UKCA marked labels are available upon request.
Shipping & Packing: Each charger includes selected input power cord, output XLR cable, and user manual. Master carton contains 25 units (460×340×370mm).
Maintenance Tips for Extended Battery Life
- Always recharge the battery promptly after use – even a few hours of deep discharge can shorten life.
- Use the correct charger – our 3A charger is precisely designed for 18‑36Ah lead‑acid batteries.
- Check electrolyte levels (for flooded batteries) every month; add distilled water if low.
- Store batteries in a cool, dry location when not in use; avoid freezing temperatures.
