12.6V 3A Li-ion Battery Charger – For 12V LED Battery Packs
Keep your portable LED power ready for the next event. This charger is specifically designed for 3S lithium-ion battery packs – including our 12V 12.5Ah and 12V 20Ah battery packs.
Here's how it works: Plug the charger into any standard UK mains socket, connect the DC barrel plug to your battery pack's charging port, and leave it to do its job. The charger delivers 3A until the battery approaches full charge, then automatically reduces current and switches off when complete. No monitoring required – just plug in and walk away.
Why it matters: Lithium-ion batteries need the correct charging voltage to stay healthy and safe. This charger outputs exactly 12.6V – the precise full-charge voltage for 3S li-ion packs. Using the wrong charger risks damaging your battery or creating a safety hazard. This one's matched to the job.
Key Advantages
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3A charging current – Fast, efficient charging without stressing the battery. Recharges our 12.5Ah pack in approximately 4-5 hours, the 20Ah pack in 7-8 hours.
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Universal mains input (100-240V) – Works with UK and international mains supplies. Take it abroad for events without needing a voltage converter.
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Automatic shutoff – The charger reduces current as the battery fills, then stops charging when complete. No risk of overcharging if you leave it connected overnight.
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Built-in protection – Short circuit and overcurrent protection with automatic recovery. If something goes wrong, the charger protects itself and the battery.
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Compact desktop design – At just 126 × 56 × 32mm, it's smaller than most laptop chargers. Easy to pack with your batteries for on-location charging.
Perfect Applications
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Overnight charging between events – Connect your battery packs at the end of the day, and they're ready for the next morning. The automatic shutoff means you can leave them charging safely.
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Multiple battery rotation – If you're running several batteries across a multi-day event, charge depleted packs while others are in use. The fast 3A charge rate gets them back in action quickly.
Essential accessory for anyone using our rechargeable 12V battery packs for market stalls, fairground lighting, portable signage, or event displays.
Browse our 12V battery packs or contact our technical team for advice: sales@weloveleds.co.uk
Charging Times
Times shown are for a fully depleted battery. Partial recharges take proportionally less time.
Product Supply
Charger supplied individually with UK mains cable attached.
What You Receive:
- 1× 12.6V 3A Li-ion charger – Desktop-style unit with integrated UK 3-pin mains plug
- DC output cable – Fitted with DC 5.5×2.1mm barrel connector to match our battery packs
What's Not Included:
- Battery pack – Available separately: 12V 12.5Ah or 12V 20Ah options
- Extension cables – Use the charger connected directly to the battery pack
Charging Notes:
Do not charge batteries below 0°C or above 40°C. For best battery longevity, avoid leaving batteries on charge for extended periods after the charge cycle completes.
Understanding Li-ion Charging
Lithium-ion batteries require precise charging to remain safe and achieve maximum lifespan. A 3S (three-cell series) li-ion pack like our 12V batteries has a full-charge voltage of 12.6V – this charger is specifically designed to deliver exactly that voltage, with intelligent current control that protects the cells during charging.
In Plain English: Plug it in, connect your battery, and the charger does everything automatically. It charges fast at first, slows down as the battery fills, and stops when complete.
Technical Specifications
- Output Voltage: 12.6V DC (±0.2V)
- Output Current: 3.0A (±0.2A) constant current mode
- Maximum Power: 37.8W
- Input Voltage: 100-240V AC (universal mains)
- Input Frequency: 50-60Hz
- Efficiency: ≥85% (100V), ≥87% (240V)
- Standby Power: <2W
- Dimensions: 126 × 56 × 31.5mm
- Output Connector: DC 5.5 × 2.1mm barrel plug
- Operating Temperature: 0°C to 40°C
- Storage Temperature: -20°C to 85°C
- Protection: Short circuit, overcurrent (auto-recovery)
Compatibility
- ✅ 12V 12.5Ah Rechargeable Battery Pack
- ✅ 12V 20Ah Rechargeable Battery Pack
- ✅ Any 3S lithium-ion battery pack with DC 5.5×2.1mm charging port
Safety Notes
- Only use with compatible 3S li-ion battery packs
- Do not charge damaged or swollen batteries
- Charge in a well-ventilated area
- Do not cover the charger during use
- Disconnect after charging completes
