# Battery charger CTEK M25 12V 25A Marine, 12 V 25 A

**URL:** https://aio.lv/en/product--ctek-40-201--11221827
**Data updated:** 2026-03-07 19:52 (EET)
**Category:** Battery chargers
**Manufacturer:** CTEK
**Manufacturer code:** 40-201
**EAN:** 7340103402015
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

CTEK M25 12V 25A Marine battery charger is a 12‑volt, 25‑amp marine‑grade charger designed for charging and maintaining lead‑acid batteries aboard boats and other marine applications. It delivers controlled charging current for efficient battery charging, helps maintain battery health, and is suitable for regular charging, maintenance and storage to ensure reliable starts and extended battery life.

## Long description

CTEK M25 12V 25A Marine is a 12‑volt, 25‑amp charger engineered for marine battery care. It provides controlled, multi‑stage charging and maintenance for lead‑acid battery types commonly used on boats, supporting efficient recharge, minimised sulfation risk and extended service life. The design is suitable for onboard installation and regular seasonal use, delivering a stable current that adapts to battery condition to help ensure reliable engine starts and dependable auxiliary power.
Advantages
The CTEK M25 offers a compact marine‑grade solution that balances high charging current with intelligent battery management to reduce overcharging and overheating. Its multi‑stage charging algorithm optimises charging efficiency and battery health during bulk charge, absorption and maintenance phases. The unit is built to withstand marine environments and provides consistent performance for repeated charge and storage cycles.
Suitable for
 Charging and maintaining 12 V lead‑acid batteries on motorboats and sailboats
 Regular seasonal charging and long‑term storage maintenance
 Recharging starter and service batteries used for onboard electronics and propulsion
Key specifications
 Nominal output voltage: 12 V
 Maximum charging current: 25 A
 Designed for lead‑acid battery types (including flooded, AGM and GEL where applicable)
 Multi‑stage charging algorithm with bulk, absorption and maintenance stages
 Marine‑grade construction suitable for onboard use
 Automatic current regulation to adapt to battery condition
How to use
Connect the charger to the battery following the manufacturer’s connection order and polarity indications, ensuring a secure connection to battery terminals or to a designated onboard connection point. Select the appropriate charge program if the unit provides mode selection for specific lead‑acid types, then start charging. Monitor charging progress via the charger’s status indicators and allow the charger to complete its automatic charge and maintenance cycle before disconnecting. For batteries in service, leave the charger connected for storage maintenance as required.
Usage recommendations
For safe and effective results, use the CTEK M25 in well‑ventilated areas and follow battery manufacturer guidance regarding charging parameters and temperature limits. Inspect cables and terminal connections regularly and avoid prolonged use if battery shows signs of damage. For seasonal lay‑up, keep the charger connected in maintenance mode to prevent self‑discharge and sulphation.

## FAQ

### What payment options are available?

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### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All CTEK products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized CTEK service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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