--- product_id: 165827988 title: "Casil 12V 1.2Ah Auxiliary Battery for Mercedes-Benz, Replaces N000000004039" brand: "casil" price: "$49.87" currency: USD in_stock: true category: "Casil" url: https://www.desertcart.us/products/165827988-casil-12v-1-2ah-auxiliary-battery-for-mercedes-benz-replaces store_origin: US region: United States of America --- # F1 Faston terminals for quick install 12V 1.2Ah reliable power Maintenance-free AGM tech Casil 12V 1.2Ah Auxiliary Battery for Mercedes-Benz, Replaces N000000004039 **Brand:** casil **Price:** $49.87 **Availability:** ✅ In Stock ## Summary > 🔋 Power your prestige with Casil’s sleek, maintenance-free battery. ## Quick Answers - **What is this?** Casil 12V 1.2Ah Auxiliary Battery for Mercedes-Benz, Replaces N000000004039 by casil - **How much does it cost?** $49.87 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/165827988-casil-12v-1-2ah-auxiliary-battery-for-mercedes-benz-replaces) ## Best For - casil enthusiasts ## Why This Product - Trusted casil brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact Yet Mighty:** Slim, lightweight footprint fits snugly in tight compartments without compromising power. - • **Plug & Play Simplicity:** Standard F1 Faston terminals ensure effortless, secure installation in your vehicle or backup system. - • **Power Up with Precision:** 12V 1.2Ah capacity delivers consistent auxiliary power tailored for luxury Mercedes-Benz models. - • **Tailored for Mercedes-Benz:** Direct OEM replacement compatible with E-Class, S-Class, GL-Class, CLS, ML, and CLA models—fit guaranteed or your FOMO kicks in. - • **Zero Maintenance, Maximum Confidence:** Sealed AGM design means no spills, no refills—just hassle-free, safe indoor use. ## Overview The Casil 12V 1.2Ah SLA AGM Battery is a rechargeable, maintenance-free auxiliary power source designed specifically for select Mercedes-Benz models. Featuring sealed AGM technology for safe, spill-proof use and standard F1 Faston terminals for easy installation, this compact battery delivers reliable 12V power in a lightweight design, making it the perfect OEM replacement for luxury vehicle backup systems. ## Description Buy Casil 12V 1.2Ah SLA AGM Battery – Rechargeable Auxiliary Power – Compatible with Mercedes-Benz N000000004039: 12V - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## Features - CHECK YOUR OLD BATTERY FIRST: Replaces the Mercedes-Benz auxiliary (backup) battery with part number N000000004039 on its label: 12V 1.2Ah AGM, F1 (0.187 in) terminals, about 3.86 x 1.69 x 2.05 in. Some models use a different auxiliary battery (A0009829308, A2059053414 or a 12V 12Ah unit) that this battery does not replace. - COMMON FITS: ML-Class W164 and GL-Class X164, S-Class W221, C-Class W204 and R-Class W251 cars fitted with the N000000004039 battery. Auxiliary batteries change by model and year (for example E-Class, GLK and the 2012+ ML), so match the label before you order. - FIX THE AUXILIARY BATTERY MALFUNCTION MESSAGE: The usual repair when the dashboard shows 'Auxiliary Battery Malfunction' and the old auxiliary battery no longer holds a charge. - EASY SWAP: Note which lead goes to + and -, move the two F1 connectors to the new battery the same way and refit the holder. Terminal positions can differ slightly from the original, so compare the two batteries before you remove the old one. - SEALED, MAINTENANCE-FREE, 1-YEAR WARRANTY: Spill-proof AGM that needs no watering and works in any position. Battery only, no wires. 1-year pro-rated warranty from Casil. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07TD9LKTH | | Battery Capacity | 1.2 amp_hours | | Battery Cell Composition | Lead Acid | | Battery Type | Lead Acid | | Best Sellers Rank | #55,779 in Health & Household ( See Top 100 in Health & Household ) #89 in 12V Batteries | | Brand | Casil | | Brand Name | Casil | | Compatible with Vehicle Type | AP1212, Auxiliary battery systems for luxury vehicles, BP1.2-12, CP1212, ML1.2-12, UB1212 | | Customer Reviews | 4.4 out of 5 stars 255 Reviews | | Included Components | 1 x CA1212 12V 1.2Ah battery | | Item Dimensions D x W x H | 3.86"D x 1.69"W x 2.05"H | | Item Highlight | Sealed AGM Backup Battery, F1 Terminals, for ML W164, GL X164, S-Class W221, C-Class W204, R-Class W251 | | Item Type Name | Battery | | Item Weight | 16 ounces | | Manufacturer | Chee Yuen Industrial Co., Ltd | | Manufacturer Part Number | 12v 1.2ah | | Manufacturer Warranty Description | 1 year prorated warranty | | Model Number | 12v 1.2ah | | Number Of Cells | 6 | | Number of Items | 1 | | Size | 1 Pack | | Terminal | F1 Terminal | | UPC | 305487660809 762319436917 | | Unit Count | 1 Count | | Vehicle Service Type | AP1212, Auxiliary battery systems for luxury vehicles, BP1.2-12, CP1212, ML1.2-12, UB1212 | | Voltage | 12 volts | ## Product Details - **Battery Capacity:** 1.2 amp_hours - **Battery Cell Composition:** Lead Acid - **Brand:** Casil - **Item Weight:** 16 ounces - **Number Of Cells:** 6 - **Product Dimensions:** 1.69"D x 3.82"W x 2.28"H - **Size:** 1 Pack - **Terminal:** F1 Terminal - **Vehicle Service Type:** AP1212, Auxiliary battery systems for luxury vehicles, BP1.2-12, CP1212, ML1.2-12, UB1212 - **Voltage:** 12 volts ## Images ![Casil 12V 1.2Ah Auxiliary Battery for Mercedes-Benz, Replaces N000000004039 - Image 1](https://m.media-amazon.com/images/I/61c5fGV8lzL.jpg) ![Casil 12V 1.2Ah Auxiliary Battery for Mercedes-Benz, Replaces N000000004039 - Image 2](https://m.media-amazon.com/images/I/71utG6J1veL.jpg) ![Casil 12V 1.2Ah Auxiliary Battery for Mercedes-Benz, Replaces N000000004039 - Image 3](https://m.media-amazon.com/images/I/71AUiZ8oOLL.jpg) ![Casil 12V 1.2Ah Auxiliary Battery for Mercedes-Benz, Replaces N000000004039 - Image 4](https://m.media-amazon.com/images/I/71QNNV9Bn8L.jpg) ![Casil 12V 1.2Ah Auxiliary Battery for Mercedes-Benz, Replaces N000000004039 - Image 5](https://m.media-amazon.com/images/I/81K-oMLcq0L.jpg) ## Questions & Answers **Q: Can I use this battery for a go kart** A: All these type of batteries are specific for each use and fit. You have to make sure the polarity is correct, that the battery will fit the holder and that the terminal clips have enough room. I do not know enough about the kart to answer otherwise. **Q: will it operate a 540 820 watt brushless motor** A: It has to replace the original battery so I do not know. ## Frequently Bought Together - Casil 12v 1.2ah Rechargeable Sealed Lead Acid Replacement Battery for Mercedes Auxiliary Battery, 12volt 1.2 amp Compatible with n0000004039 12v 1.2ah Mercedes - 12V Sealed Lead Acid (SLA) Battery Charger 1300mA, with Short Circuit Protection - ML1.3-12 - 12 Volt 1.3 AH, F1 Terminal, Rechargeable SLA AGM Battery --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/165827988-casil-12v-1-2ah-auxiliary-battery-for-mercedes-benz-replaces](https://www.desertcart.us/products/165827988-casil-12v-1-2ah-auxiliary-battery-for-mercedes-benz-replaces) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-11-12*