Automatic Battery Charger for Bike, Car & CCTV — 12V India
The Automatic Battery Charger for Bike, Car & CCTV from Samco is India's most trusted 12V automatic battery charger — uses Samco Battery's SMPS technology to charge any 12V lead-acid, SLA, VRLA, or MF battery from 4Ah to 30Ah. It acts as an auto cut off battery charger, stopping at 14.6V — the correct full-charge voltage for a 12V lead-acid battery — so no overcharge occurs even if left connected for days. A live digital display shows voltage and current in real time throughout. Ships free from Delhi to every city, town, and village across India.
Key specifications at a glance
Who is this charger for?
If you own, operate, or service any of the following — this charger is built for you.
What is an SMPS battery charger?
An SMPS battery charger uses high-frequency switching circuits — typically operating at 50,000 to 150,000 Hz — instead of the heavy iron-core transformers used in conventional chargers. This makes SMPS chargers significantly lighter, more energy-efficient (85–92% efficiency vs 60–70% for transformer types), and capable of regulating output voltage and current in real time. In battery charging, SMPS technology enables the constant-current to constant-voltage (CC-CV) charging profile required for safe lead-acid battery charging: the charger delivers maximum current until the battery approaches full charge, then automatically reduces current and holds voltage at exactly 14.6V until fully charged — then cuts off entirely.
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 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.
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 3 Amp Smart 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 battery charger & two-wheeler / scooter use
Car battery charger 12V — for small car & hatchback batteries
CCTV battery charger, UPS & alarm system batteries
Agricultural & rural India
Auto workshops, dealers & service garages
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 |
₹883 — 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 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. If the bike uses a 12V battery, this charger works with it.
What battery sizes is it suitable for?
4Ah to 30Ah. This covers all standard bike batteries (4Ah–14Ah), CCTV and security backup batteries (7Ah–26Ah), zataka machine batteries (7Ah–12Ah), and spray pump batteries. For batteries larger than 30Ah — such as inverter batteries — a higher-amperage charger is recommended.
Can it charge CCTV and security system batteries?
Yes. Any 12V SLA or VRLA battery in a CCTV system, fire alarm panel, access control unit, or electric gate controller in the 7Ah–26Ah range. Auto cut-off is essential for these applications — security batteries are charged unattended during maintenance visits, and overcharging would destroy the battery silently.
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.
Which states in India does Samco Battery deliver to?
Samco delivers to all 28 states and 8 union territories of India — including Maharashtra, Karnataka, Tamil Nadu, Uttar Pradesh, West Bengal, Rajasthan, Gujarat, Madhya Pradesh, Andhra Pradesh, Telangana, Punjab, Haryana, Bihar, Odisha, Kerala, Jharkhand, Assam, Chhattisgarh, Uttarakhand, Himachal Pradesh, Goa, Jammu & Kashmir, and all northeastern states. Shipping via India Post Speed Post and Trackon Courier to 19,000+ pincodes. Delivery in 2–7 business days.
Where does Samco ship from and how long does delivery take?
Samco Battery ships from its store at 21 Gokhale Market, Delhi — 110054. Same-day dispatch for orders placed before 3 PM. Delivery takes 2–7 business days depending on location: 2–3 days for Delhi NCR and nearby states, 4–5 days for most of India, up to 7 days for remote and northeastern areas. COD and UPI accepted.
What is the price and how do I order?
₹883, all taxes included, free shipping pan India. Order by calling or messaging on WhatsApp at 99539 35912. No online cart — Samco confirms availability, takes your address, and dispatches same day from Delhi.
Is dealer or wholesale pricing available?
Yes. Contact Samco Battery on WhatsApp or by phone for bulk and dealer pricing. Samco has been supplying dealers, garages, and workshops across India since 2000 and offers volume discounts for regular and large-quantity orders.
What is the difference between this and a regular transformer charger?
A transformer charger pushes a fixed current until manually disconnected — if forgotten, it keeps charging and damages the battery. This SMPS charger monitors voltage continuously, tapers current as the battery fills (CC-CV method), and cuts off at 14.6V automatically. It is lighter, cooler-running, tolerates voltage fluctuations (160–280V), and is fundamentally safer for daily and unattended use.
Can this charge an inverter battery?
This charger works as a 12V inverter battery charger and battery charger for inverter for small inverter backup batteries in the 7Ah–30Ah range — the type used in small home UPS units, solar backup systems, and office UPS equipment. It is not suitable for large inverter batteries (60Ah, 100Ah, 150Ah, 200Ah) used in home inverters like Microtek, Luminous, Su-Kam, or Exide — those require a 10A–20A charger. If your inverter battery is 4Ah to 30Ah, this charger works perfectly with auto cut-off at 14.6V.
Can it charge SLA, VRLA, and sealed batteries?
Yes. This is a fully compatible SLA battery charger, VRLA battery charger, and sealed battery charger for any 12V battery in the 4Ah–30Ah range. SLA (Sealed Lead Acid), VRLA (Valve-Regulated Lead Acid), and Maintenance Free (MF) batteries all charge to 14.6V cutoff — the same as flooded lead-acid. These battery types are used in CCTV systems, fire alarm panels, UPS units, solar backup, electric fences, and all Indian two-wheelers.
Can I use this as a car battery charger?
Yes, for small car batteries. This 12V car battery charger works on any car with a 12V lead-acid battery in the 20Ah–30Ah range — Maruti Suzuki Alto, WagonR, Swift · Hyundai Santro, i10 · Tata Nano, Indica, and similar small hatchbacks. For cars with larger batteries (35Ah+), a higher-amperage charger is recommended for faster charging — this 3A charger will work but will take longer. Auto cut-off at 14.6V makes it completely safe to leave connected overnight.
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:
All orders dispatched same day (Mon–Sat, before 3 PM) from our Delhi store. COD and UPI accepted on every order.
Buy the 12V 3 Amp Smart Battery Charger — ₹883
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