Advanced SMPS · Auto 12V/24V · Smooth 0.01–25A Dial · Digital Display
12V 24V SMPS Battery Charger 25 Amp — Variable Current, Auto Voltage, India
Key Facts — 12V 24V 25A SMPS Charger
Smooth Continuous Dial — 0.01A to 25A
Not a step knob. Unlike fixed-step chargers (3A → 6A → 9A jumps), the smooth dial sets any value — 0.5A for a 4Ah bike battery, 10A for a 100Ah inverter, or 25A for a 200Ah truck battery.
This vs Standard 12V 25A or 24V 25A SMPS Charger
Standard SMPS chargers are fixed to one voltage — you need two units to cover 12V and 24V. This model auto-detects both. The smooth dial replaces the step knob, giving you precise current from 0.01A to 25A.
| Feature | Standard 12V 25A or 24V 25A SMPS |
This Charger 12V/24V 25A |
|---|---|---|
| Voltage Support | Fixed — one voltage | ✅ Auto 12V & 24V |
| Current Adjustment | Step knob (fixed values) | ✅ Smooth dial 0.01–25A |
| Lowest Current | 3A typical minimum | ✅ As low as 0.01A |
| Display | Basic / analogue | ✅ Digital V & A |
| Units needed | 2 units for both voltages | ✅ 1 unit covers both |
| Charging Modes | Boost only / basic | ✅ Float + Boost (FCBC) |
🛒 Which to choose?
Choose this 25A model if you charge both 12V and 24V batteries (trucks, DG sets, forklifts alongside cars and bikes) — or if you need precise low-current control below 3A for small or delicate batteries.
Why This 25A SMPS Battery Charger Works for Indian Workshops
- 🎛️Smooth dial 0.01A–25A — Set any current precisely. Critical for batteries under 30Ah where 3A step knobs overcharge.
- 🔄Auto 12V / 24V voltage detection — Connect and charge. No manual switch, no risk of wrong-voltage damage.
- 📟Digital display — Live voltage and current readings. Monitors charge progress in real time.
- 🛠️FCBC battery repair mode — Boost mode breaks lead sulphate crystals. Recovers old, sulphated and deeply discharged batteries.
- 🛡️Triple protection — Reverse polarity, overload and short circuit. Safe for workshop staff at all skill levels.
- 🔥45°C+ rated for Indian summers — High-speed cooling fan and heavy-duty winding for non-AC workshops.
- 🔁24×7 continuous commercial duty — No throttling or thermal cutout under sustained workshop load.
How to Charge a Battery with This 12V 24V 25A SMPS Charger
Connect clamps. Red to positive (+), black to negative (−). Auto voltage detection identifies 12V or 24V within seconds.
Select Boost or Float. Boost for charging and repair. Float for maintenance of a battery already at full charge.
Set current via smooth dial. Use 10% of battery Ah as a guide — 100Ah battery → 10A. For trickle / maintenance → 0.5A.
Watch the digital display. Current drops as the battery fills. When it falls below 1–2A, the battery is near full charge.
Disconnect or switch to Float. Float mode holds the battery indefinitely without overcharging — ideal for DG sets and standby systems.
FCBC Charging Modes
⚡ Boost Mode
Active charging and sulphation repair. Higher voltage breaks lead sulphate crystals. Revives deeply discharged batteries.
🌿 Float Mode
Long-term maintenance. Safe voltage, no gassing. For DG sets, showroom vehicles and seasonal storage.
Recommended Current by Battery Size
- 🏍️Bike / scooter (4–14Ah) — 0.5A to 1.5A. Smooth dial essential — step knobs start at 3A and overcharge these.
- 🚗Car (35–75Ah) — 4A to 7A overnight; up to 10A for faster charge.
- 🔋Inverter / tubular (100–220Ah) — 10A to 15A standard; 20–25A for fast recovery.
- 🚛Truck / DG / forklift (100–200Ah, 24V) — 10A to 25A depending on urgency.
How Long to Charge Your Battery?
| Parameter | Value |
|---|---|
| Input Voltage | 220V AC, 50Hz |
| Output Voltage | 12V / 24V (auto-selected) |
| Charging Current | 0.01A – 25A (smooth continuous dial) |
| Current Control | Smooth precision dial — not a step knob |
| Battery Capacity | 4Ah to 200Ah+ |
| Battery Types | Lead Acid, VRLA, SMF, AGM, Tubular, Gel |
| Cooling | High-speed fan · 45°C+ rated |
| Charging Modes | Float & Boost — FCBC (switch selectable) |
| Display | Digital — live voltage & current |
| Protection | Reverse polarity, overload, short circuit |
| Duty Cycle | 24×7 continuous commercial |
| Climate Rating | Up to 45°C (Indian conditions) |
| Model | SMPS-1224-25A-DIG |
Compatible brands
Common Questions — 12V 24V 25A SMPS Battery Charger
A standard 12V 25A SMPS charger only charges 12V batteries. The 12V/24V 25A model auto-detects both voltages — one unit covers cars and bikes (12V) as well as trucks, DG sets and forklifts (24V). You avoid buying two separate chargers and eliminate wrong-voltage risk. It also has a smooth dial (0.01A–25A) versus the fixed step knobs on standard units.
Set the dial to 10A — that is 10% of 100Ah, the standard safe C-rate for lead-acid and tubular batteries. At 10A a 100Ah battery at 50% charge takes roughly 6–7 hours. The smooth dial lets you set exactly 10A; step knobs on standard chargers force you to choose between 9A or 12A. Reduce current if the battery feels warm during charging.
Yes. FCBC Boost mode delivers elevated voltage that breaks down lead sulphate crystals on battery plates — the main cause of capacity loss in old, underused or chronically undercharged batteries. For a critically flat battery, start at 0.01A–0.5A on the smooth dial to gently wake it before ramping up current. Works on flat plate, tubular, AGM and VRLA batteries.
A fully discharged 150Ah battery takes about 7–8 hours at 25A (includes ~15% lead-acid inefficiency). At 50% discharge it takes roughly 3.5–4 hours. Use Boost mode for charging, then switch to Float when the digital display shows current below 1–2A. Use the calculator above for your exact size and starting level.
Yes. Generator batteries are typically 12V or 24V series systems — auto voltage detection covers both. Float mode keeps the battery permanently charged and start-ready, preventing the most common DG set problem in India: failure to start during a power cut due to a flat battery. Works for Kirloskar, Cummins and Ashok Leyland DG sets and for 24V forklifts and stackers.
Compatible with all major Indian brands — Exide, Amaron, Luminous, Okaya, Microtek, Livguard and Su-Kam — and all lead-acid chemistries: flat plate, tall tubular, SMF, VRLA, AGM and Gel. Covers 4Ah two-wheeler batteries to 200Ah tall tubular inverter batteries and 24V industrial batteries.
6-month manufacturer warranty on all defects in materials and workmanship. Returns accepted within 3 days for unopened, original-packed products — return shipping at buyer's cost. Refund in 3–5 business days. Full details at smpsbatterycharger.in/warranty/. For warranty claims: Call or WhatsApp +91 99539 35912 Mon–Sat 11AM–5PM.
🛡️ 6-Month Warranty
Covers manufacturing defects — display, circuits, dial, protection systems, connectors. Not covered: physical damage, power surges, water damage, unauthorised modifications. GST invoice required for all claims.
🔄 3-Day Returns
Return within 3 days of delivery for a full refund. Product must be unopened in original packaging. Return shipping at buyer's cost. Refund in 3–5 business days. Full shipping & return policy ↗
🚚 Shipping
Ships from Delhi to 19,000+ PIN codes across all 28 states — Mumbai, Bangalore, Chennai, Hyderabad, Pune, Kolkata, Lucknow, Jaipur, Ahmedabad and all cities, towns and villages. Delivery: 3–7 business days.
🛠️ Claim Process
- Call or WhatsApp with invoice and issue description
- Engineers troubleshoot by phone — most resolved here
- If unresolved: ship unit to Delhi service centre
- Repaired or replaced within 7–10 business days
Mon–Sat · 11AM–5PM IST
Samco Battery · Est. 2000
21 Gokhale Market, Near Kashmere Gate Metro,
Delhi – 110054, India