Bike Battery Charger — Automatic 12V, Car & CCTV
The Samco 12V 3A Smart Battery Charger uses SMPS technology to charge 12V lead-acid, SLA, VRLA, and MF batteries from 4Ah to 30Ah. It cuts off automatically at 14.6V, the correct full-charge voltage for a 12V lead-acid battery. This prevents overcharging even if the charger stays connected for days. A digital display shows live voltage and current throughout charging. Samco ships the charger free from Delhi to every city, town, and village in India.
Key specifications at a glance
Who is this charger for?
Most buyers use it as a battery charger for bike and scooter batteries, but it covers much more. If you own, operate, or service any of the following — this charger is built for you.
See the Samco 12V 3 Amp Charger in action
What is an SMPS battery charger?
An SMPS battery charger uses high-frequency electronic switching instead of a heavy transformer. It is lighter, more efficient (85–92% vs 60–70%), and enables CC-CV charging with automatic cut-off at 14.6V — the safest type of 12V battery charger for unattended charging of lead-acid batteries.
How does automatic charging work?
Cheap transformer-based chargers push a fixed current until you manually unplug them. If forgotten, the battery overcharges — plates warp, electrolyte boils, and battery life drops sharply. This automatic battery charger monitors voltage in real time, tapers current as the battery fills, and cuts off automatically at 14.6V. Leave it overnight or for days. It stops by itself.
Auto cut-off at 14.6V
Stops the moment your battery reaches full charge voltage. No overcharge, no damage, no monitoring needed. Safe to leave connected overnight or while you sleep.
Live digital display
Shows output voltage and charging current simultaneously in real time throughout the entire charge. You always know exactly what is happening inside the battery.
3-way protection
Reverse polarity, short circuit, and overload protection are active throughout. Safe even if clips are accidentally reversed before plugging in.
Samco 12V 3A Smart Battery Charger — features at a glance
SMPS charger vs transformer charger — which is safer?
The SMPS charger is safer, lighter, and smarter than a conventional transformer charger in every measurable way. Here is a direct comparison:
| Feature | Samco SMPS Charger (This) | Conventional Transformer Charger |
|---|---|---|
| Auto cut-off | Yes — stops at 14.6V automatically | No — must be unplugged manually |
| Overcharge risk | None — cut-off prevents it | High — damages battery if forgotten |
| Live display | Voltage + current shown in real time | None — no feedback during charging |
| Charging method | CC-CV (constant-current / constant-voltage) | Fixed current only |
| Weight | Light — SMPS technology is compact | Heavy — iron-core transformer |
| Heat during use | Minimal — high efficiency (85–92%) | Gets hot — 60–70% efficiency |
| Safe unattended | Yes — auto cut-off + 3-way protection | No — risk of fire or battery damage |
| Input voltage range | 160–280V AC — tolerates fluctuation | Narrow — sensitive to voltage dips |
How to charge a dead bike or scooter battery — step by step
The Samco 12V 3A battery charger is plug-and-play. Total hands-on time: under 2 minutes. The charger does everything else automatically.
Connect the charger clips to the battery
Connect the red clip to the positive terminal (+) and the black clip to the negative terminal (–). Reverse polarity protection is active, but correct connection is always good practice. Do not plug into mains yet.
Plug into the 230V AC wall socket
The charger accepts 160–280V AC at 50Hz — it works on Indian mains power across all states, including areas with voltage fluctuation. The display lights up and shows the battery's current voltage immediately.
Read the live display
The LCD shows output voltage and charging current in real time. A deeply discharged battery may start at 10–11V and draw close to 3A. A partially drained battery will start at 12–13V and draw less. Both are normal.
Wait — the charger tapers current automatically (CC-CV)
As the battery fills, the SMPS charger automatically reduces the charging current while holding voltage constant (CC-CV method). You do not need to adjust or monitor anything — the charger handles it entirely on its own.
Charger auto-stops at 14.6V — battery is full
When the battery reaches 14.6V — the standard absorption voltage for a 12V lead-acid, SLA, VRLA, or MF battery — the charger cuts off automatically. The display shows 14.6V at near-zero current. Disconnect the clips. Battery is ready to use.
Applications — who uses this charger across India?
This charger covers the complete range of 12V batteries used in Indian homes, farms, garages, and commercial premises — from 4Ah bike batteries to 30Ah industrial backup units. Samco ships from Delhi to Maharashtra, Karnataka, Tamil Nadu, Uttar Pradesh, West Bengal, Rajasthan, Gujarat, Madhya Pradesh, Andhra Pradesh, Telangana, Punjab, Haryana, Kerala, Bihar, Odisha, Assam, and every other state and union territory in India.
Bike, scooter & car battery charger — two-wheelers and small cars
CCTV, UPS & security system batteries
Agricultural & rural India
Technical specifications — 12V 3 amp charger (3A SMPS)
| Input voltage | 160–280V AC, 50Hz |
|---|---|
| Output voltage | 12V DC |
| Max charging current | 3 Amps |
| Auto cut-off voltage | 14.6V |
| Display | Digital LCD — voltage & current |
| Battery compatibility | Lead acid, SLA, VRLA, MF — 4Ah to 30Ah |
| Technology | High-efficiency SMPS (CC-CV) |
| Protection | Reverse polarity, short circuit, overload |
| Warranty | 6 months |
| SKU | SAMCO-12V-3A |
Rs 983 — all taxes included. Free pan-India shipping. Buy online or by WhatsApp.
- Ships from Delhi — same day dispatch (Mon–Sat before 3 PM)
- Delivery 2–7 business days across India
- Free shipping to 19,000+ pin codes across India
- COD & UPI accepted
- 6 months warranty · Trusted since 2000
About Samco Battery — expertise & experience
Samco Battery was established in at 21 Gokhale Market, Delhi — near Kashmere Gate Metro Station. The founder, Arender Siali, is trained at CECRI (Central Electrochemical Research Institute, Karaikudi) and is a life member of SAEST (Society for Advancement of Electrochemical Science and Technology). With over 25 years of hands-on electrochemical expertise, Samco has supplied SMPS battery chargers, battery load testers, and charging equipment to bike garages, CCTV installers, agricultural dealers, and battery wholesalers across India — serving 19,000+ pin codes via India Post Speed Post and Trackon Courier.
Frequently asked questions
Detailed answers about the Samco 12V 3 Amp Smart Battery Charger — for buyers, technicians, and dealers.
Will it overcharge my battery if left on overnight?
No. The charger automatically cuts off at 14.6V — the correct full-charge voltage for a 12V lead-acid battery. Once the battery reaches 14.6V, the charger stops completely. Reverse polarity, short circuit, and overload protection are also active throughout. Completely safe to leave connected overnight, for days, or unattended for any duration.
What voltage is a 12V lead-acid battery when fully charged?
A 12V lead-acid battery — including sealed (SLA), valve-regulated (VRLA), and maintenance-free (MF) types — is considered fully charged at 14.4V to 14.6V under charge (absorption voltage). At rest after charging, it settles to approximately 12.6V to 12.8V. The Samco 3 Amp charger cuts off at exactly 14.6V, which is the correct absorption/full-charge voltage for all standard 12V lead-acid chemistries.
How long does it take to charge a 12V 7Ah battery at 3 amps?
A fully depleted 12V 7Ah battery takes approximately 2.5 to 3 hours to fully charge at 3 amps. The formula is: Ah ÷ charge rate × 1.2 (efficiency factor) = hours. So 7Ah ÷ 3A × 1.2 ≈ 2.8 hours. A 12V 12Ah battery takes approximately 4–5 hours. A 12V 26Ah battery takes approximately 9–11 hours. For a partially discharged battery, times are proportionally shorter.
Which bikes and battery sizes is it compatible with?
Any 12V two-wheeler sold in India — Honda Activa, Dio, Shine · Hero Splendor, HF Deluxe, CD 110 · Bajaj Pulsar · TVS Jupiter, Apache · Suzuki Access · Royal Enfield · Yamaha and all others with a 4Ah–14Ah lead-acid or MF battery. More broadly, the charger suits 4Ah to 30Ah batteries — covering bike batteries, CCTV and security backup batteries (7Ah–26Ah), and zataka/spray pump batteries. For batteries larger than 30Ah, such as inverter batteries, a higher-amperage charger is recommended.
Is SMPS safer than a conventional transformer battery charger?
Yes, significantly. SMPS chargers use CC-CV (constant-current/constant-voltage) charging with automatic cut-off at full-charge voltage. Transformer chargers push a fixed unregulated current until manually disconnected — leaving one connected overnight on a full battery causes overcharging, electrolyte loss, plate warping, and in rare cases, thermal runaway. SMPS chargers also run cooler (85–92% efficiency vs 60–70%) and tolerate input voltage fluctuations (160–280V) that may damage older transformer-based units.
Where does Samco ship from, which areas are covered, and how long does delivery take?
Samco Battery ships from its store at 21 Gokhale Market, Delhi — 110054, with same-day dispatch for orders placed before 3 PM. Samco delivers to all 28 states and 8 union territories of India via India Post Speed Post and Trackon Courier, covering 19,000+ pincodes. Delivery takes 2–3 days for Delhi NCR, 3–5 days for most of India, and up to 7 days for remote and northeastern areas. COD and UPI accepted.
What is the price, how do I order, and is dealer pricing available?
Rs 983, all taxes included, free shipping pan India. Order by calling or messaging on WhatsApp at 99539 35912 — Samco confirms availability, takes your address, and dispatches same day from Delhi. Dealer and wholesale pricing is also available; Samco has supplied dealers, garages, and workshops across India since 2000 and offers volume discounts for regular and large-quantity orders.
Can it charge car, CCTV, SLA/VRLA, and small inverter batteries?
Yes, within its 4Ah–30Ah range. It works as a 12V car battery charger for car batteries up to 30Ah; most current hatchbacks (Alto, WagonR, Santro, i10) ship with 32Ah–35Ah batteries — for those, the Samco 12V 6 Amp charger (car batteries 35Ah–100Ah) is the right tool. For CCTV, fire alarm, and security panels, it handles 12V SLA/VRLA batteries in the 7Ah–26Ah range. All SLA, VRLA, and MF chemistries charge safely to 14.6V cutoff. For inverter use, it suits small UPS and solar backup batteries (7Ah–30Ah) only — not large 60Ah–200Ah home inverter batteries, which need a 10A–20A charger.
Free shipping across India — bike, car & two wheeler battery charger
Battery charger buy online India — Samco Battery dispatches from Delhi via India Post Speed Post and Trackon Courier. Every order ships free — no minimum order value. Estimated delivery times by region:
| Region | States & Cities Covered | Est. Delivery | Shipping Cost |
|---|---|---|---|
| Delhi NCR | Delhi, Noida, Gurugram, Faridabad, Ghaziabad | 2–3 days | Free |
| North & West India | UP, Punjab, Haryana, Rajasthan, Gujarat, MP — Lucknow, Jaipur, Chandigarh, Ahmedabad, Bhopal & more | 2–5 days | Free |
| South, East & Central India | Maharashtra, Karnataka, Tamil Nadu, Telangana, AP, West Bengal, Bihar, Odisha, Kerala, Chhattisgarh — Mumbai, Bengaluru, Chennai, Hyderabad, Kolkata & more | 3–6 days | Free |
| Northeast, Hills & Remote Areas | Assam & Northeast, Himachal Pradesh, Uttarakhand, J&K, Goa, Andaman & Nicobar — Guwahati, Shimla, Dehradun, Srinagar, Port Blair & more | 4–7 days | Free |
All orders dispatched same day (Mon–Sat, before 3 PM) from our Delhi store. COD and UPI accepted on every order. Samco delivers to every city, town, and village across all 28 states and 8 union territories of India.
Need a different capacity? Related Samco chargers
This 3 Amp charger covers 4Ah–30Ah batteries. For smaller bike batteries, larger car batteries, or big inverter banks, these Samco models fit better:
12V 2A Motorcycle Battery Charger
Compact, lighter-duty charger for 12V bike and scooter batteries in the 4Ah–14Ah range.
12V 6A Smart Battery Charger
For car batteries 35Ah–100Ah — hatchbacks, sedans, SUVs — and 12V batteries up to 120Ah, with the same 14.6V auto cut-off.
12V 20A FCBC Inverter Battery Charger
Float-cum-boost charger for large tubular inverter batteries, VRLA banks, and DG set batteries.
Buy the 12V 3 Amp Smart Battery Charger — Rs 983
Battery charger price — free shipping · Buy battery charger online India · Auto cut-off at 14.6V · 6 months warranty · Ships from Delhi to every city, town & village in India