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Battery Chargers
4 Series · 99 Models
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Battery Chargers Overview
Intelligent battery chargers restore and maintain lead-acid and lithium batteries using high-frequency switching and three-stage charging (constant current, absorption, and float) to extend service life. QDTB chargers span 10 A to 200 A with 12 V/24 V/36 V/48 V auto-detection, in KD (general), KC (premium), and KB (special) series, with over-voltage, over-temperature, short-circuit, and reverse-polarity protection for automotive, genset, marine, telecom, and UPS use.
Available Series
KD Series
The KD series intelligent battery chargers feature microprocessor-controlled three-stage charging (bulk, absorption, float) for lead-acid batteries in industrial and automotive applications.
KC Series
The KC series industrial battery chargers are designed for heavy-duty charging of large battery banks in forklifts, mining vehicles, and UPS systems.
KB Series
The KB series high-frequency battery chargers use advanced high-frequency switching technology for compact size and high efficiency battery charging.
Traction Battery Chargers Series
Traction battery chargers charge deep-cycle lead-acid or lithium batteries for forklifts, pallet trucks, golf carts and industrial vehicles, using multi-stage charging curves for full charge and long battery life. Rated 24–96V DC with current control and equalization.
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Application Scenarios
Automotive & Repair
Charges and maintains lead-acid starter batteries in workshops and garages.
Generator Sets
Keeps genset starting batteries topped up and ready.
Marine & Vessels
Reliable charging for marine battery banks in harsh conditions.
Telecommunications
Maintains backup batteries at telecom sites.
UPS Systems
Charges and maintains the battery banks that back up UPS units.
Forklifts & EVs
High-current charging for industrial traction batteries.
Technical Advantages
3-Stage Charging
Constant current, absorption and float stages extend battery life.
Automatic Voltage Detection
Senses 12V/24V/36V/48V battery banks automatically.
Full Protection
Over-voltage, over-temperature, short-circuit and reverse-polarity protection.
Lithium Support
Configurable for both lead-acid and lithium battery chemistries.
FAQ - Battery Chargers
What is 3-stage charging?
What is the difference between lead-acid and lithium chargers?
What charging current should I choose?
What is the minimum order quantity (MOQ) for Battery Chargers?
What is the delivery time for Battery Chargers?
Which standards and certifications do your Battery Chargers comply with?
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Smart 3-Stage vs Float vs Traction Charger: How to Choose
| Smart 3-Stage (KD/KC) | Float / Constant-Voltage | Traction Charger | |
|---|---|---|---|
| Charge profile | Constant current, absorption, then float | One constant voltage held indefinitely | Deep-cycle profile matched to the traction duty |
| Battery types | Lead-acid and lithium, with voltage auto-detection | Lead-acid standby banks | Traction and deep-cycle lead-acid packs |
| Effect on life | Reduces sulphation by finishing at float voltage | Keeps a standby bank ready but is slow to recharge | Designed for a full discharge and recharge each shift |
| Protection | Over-voltage, over-temperature, short circuit, reverse polarity | Depends on the model and the panel | Over-temperature and end-of-charge cut-off |
| Monitoring | Charging stage and fault indication on the front panel | Basic meters on larger units | State-of-charge indication for the operator |
| Sharing a panel | Rectifier and charger in one cabinet for substations | Common in telecom and UPS battery rooms | Charger and battery stay with the truck |
| Typical application | Gensets, marine, telecom and UPS batteries | Standby battery banks on float | Forklifts and electric vehicles |
Where QDTB® Battery Chargers Are Specified
Chargers are specified wherever a battery has to be brought back to full charge without being damaged in the process: genset starting batteries, substation and UPS battery banks, telecom sites and marine installations. The three-stage profile is what separates a charger that extends battery life from one that simply pushes current into the bank.
Automotive workshops and fleet operators use the same chargers for service batteries, where automatic voltage detection means one unit covers the common battery voltages on the shelf. Forklift and traction packs take the deep-cycle profile, because a full discharge each shift is normal duty rather than abuse.
The charging current is chosen from the battery capacity, with lead-acid normally charged at a modest fraction of its Ah rating. Reverse polarity, short circuit and over-temperature protection mean a mis-connected battery does not destroy the charger.
The range runs from 10 A to 200 A with 12 V to 48 V auto-detection. The KD, KC and KB series cover general, premium and special duties, with lithium support available on the smart models.
Frequently Asked Questions
What is 3-stage charging?
It charges at constant current, then holds absorption voltage, then drops to float to maintain charge without overcharging. This maximises battery life.
What is the difference between lead-acid and lithium chargers?
Lithium batteries need a different voltage profile and no float stage. QDTB chargers are configurable for both chemistries.
What charging current should I choose?
As a rule, charge lead-acid at 10-20% of the battery Ah rating. A 100Ah battery typically uses a 10-20A charger.
What is the minimum order quantity (MOQ) for Battery Chargers?
One unit for standard products. Custom-designed equipment is quoted on specifications — send your parameters or drawings and our sales team will confirm the MOQ for your configuration.
What is the delivery time for Battery Chargers?
Standard units are delivered in 30-45 days. Custom or large-capacity units follow a project-specific schedule confirmed at quotation. Rush orders can be accommodated for urgent projects.
Which standards and certifications do your Battery Chargers comply with?
Each unit is designed to the IEC, IEEE or GB standard your project specifies. All QDTB® equipment is ISO 9001 certified and CE marked, and the company operates ISO 9001, ISO 14001 and ISO 45001 management systems.