# 12V GEL Battery COSI CSB-1240 40Ah — Rechargeable Sealed Lead‑Acid Battery

**URL:** https://aio.lv/en/product--cosi-csb-1240-gel--7271814
**Data updated:** 2026-02-12 14:22 (EET)
**Category:** Batteries
**Manufacturer:** COSI
**Manufacturer code:** CSB-1240 GEL
**EAN:** 3100001310157
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 85.75 €
**Prices and availability valid until:** 2026-08-03 23:59
**Price without VAT (21%):** 70.87 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--cosi-csb-1240-gel--7271814

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.89 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

The COSI CSB-1240 GEL is a 12V, 40Ah sealed gel lead‑acid battery designed for reliable standby and cyclic use. Its maintenance‑free construction and gel electrolyte reduce leakage and allow varied installation positions. Suitable for UPS, alarm systems, telecom, solar backup and other applications requiring stable 12V power and moderate capacity.

## Long description

The COSI CSB-1240 GEL is a 12V 40Ah sealed gel lead‑acid battery designed to provide reliable standby and cyclic power in a compact maintenance‑free package. Its gel electrolyte construction minimises the risk of leakage and allows installation in a variety of orientations. The battery is intended for systems that require stable 12V DC power with moderate capacity and predictable discharge and recharge characteristics.
Advantages
The gel electrolyte and sealed construction eliminate the need for regular water topping and reduce the risk of spillage, making the battery suitable for indoor and enclosed installations. The battery delivers stable voltage under load and offers good deep‑discharge recovery compared to standard flooded lead‑acid types. Its maintenance‑free design and robust casing support safe, long‑term standby operation and repeated cyclic use in appropriate systems.
Suitable for
 Uninterruptible Power Supplies (UPS) for small to medium systems
 Alarm and security systems
 Telecommunications equipment and network devices
 Solar backup and off‑grid 12V systems with moderate energy needs
 Emergency lighting and medical standby devices
Key specifications
 Nominal voltage: 12 volts
 Nominal capacity: 40 ampere‑hours (Ah)
 Battery type: sealed gel lead‑acid
 Design: maintenance‑free, valve‑regulated
 Installation: can be mounted in multiple orientations due to gel electrolyte
 Typical applications: standby and cyclic use with moderate depth of discharge
How to use
Install the battery in a well‑ventilated area away from direct heat sources and corrosive environments. Connect using appropriate battery leads and terminals compatible with the device’s polarity and current rating. For standby applications, keep the battery on a suitable float/standby charger to maintain full charge and prevent sulfation. For cyclic use, follow the recommended charge algorithm for gel lead‑acid batteries: controlled constant current charge followed by a lower constant voltage phase until current tapers to a small value.
Usage recommendations
Store and operate the battery at moderate ambient temperatures for optimum lifespan. Regularly check connections for corrosion and ensure the charging equipment is set for gel battery parameters (lower charge voltages than flooded types). Replace the battery when capacity drops below the level required for reliable operation of your equipment.

## FAQ

### How much does the 12V GEL Battery COSI CSB-1240 40Ah cost, and is it available for purchase?

The price is 85.75 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 13.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can 12V GEL Battery COSI CSB-1240 40Ah be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 COSI 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 COSI 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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