XTAR 3.6V 18650 4000mAh Raw 10A Li-ion Battery Cell

These are raw, unprotected cells, so you absolutely need a device with a built-in BMS. I use them in my Convoy S2+ and a small DIY power bank project, and they perform beautifully. The flat top design fits snugly in my charger without any rattle. Capacity tested at around 3,900mAh on my XTAR VC4S, which is close enough to the rated 4000mAh. One star off only because I wish they came with a plastic storage case included—raw cells should always be stored safely. Otherwise, excellent value for the price.

These are solid 18650 cells for the price point. I use them in a Sofirn IF25A and a small desktop humidifier that takes an 18650. Capacity measured around 3,900mAh on my XTAR PB2S, which is close to the rated 4000mAh. The flat top design works fine in all my devices. My only minor gripe is that the white wrapper makes it a bit hard to tell them apart from other brands at a glance. Performance-wise, no complaints at all.

I have been running a pair of these in my Nitecore MH12 Pro for about two months now, using it every evening to walk my dog through the park. Even in cold British weather, the cells hold up well and do not drop voltage as quickly as my old Samsung 30Qs. The 10A discharge is more than enough for this light. I also appreciate that XTAR rates these at over 500 cycles—that is real long-term value. Delivery to Manchester took about ten days, which is reasonable for an overseas order.

I use these XTAR 18650 batteries in my Convoy C8+ flashlight and in a DIY power bank that I built for my motorbike trips. The 4000mAh capacity gives me much longer runtime compared to the 3000mAh cells I used before. I tested the discharge curve with my hobby charger and was impressed by how flat the voltage stays through most of the discharge. For anyone in Vietnam looking for quality 18650 cells without paying premium prices, these are a solid choice.

I bought four of these XTAR 18650 cells to replace the worn-out batteries in my Olight Warrior X Pro flashlight and my wife's headlamp. After three weeks of daily use around the house—everything from late-night reading to power outages—each cell is still holding a solid charge with no noticeable voltage sag under load. The 4000mAh capacity is a genuine upgrade over the generic cells I was using before; my flashlight now runs about 35% longer on a single charge. The 10A continuous discharge rating handles the turbo mode without any issues. I will definitely order more for my emergency kit.

As someone who builds custom mechanical keyboards, I use 18650 cells in several of my wireless builds. These XTAR cells have become my go-to choice because they maintain consistent output even after months of daily typing. The flat top works perfectly with the battery contacts I solder onto my PCBs. My only complaint is that the white wrapper scuffs easily if you are not careful during installation. Functionally though, these are rock solid.

Haven’t received them yet!

Very good quality and value just the right choice for my night vision scopes 👍

Best product! Works great with my Zebralight headlamp!

I purchased four of these XTAR 18650 cells for my home security camera backup system and a handheld spotlight I keep in the garage. Living in Bangkok where power outages are not uncommon, having reliable 18650 cells is essential. These cells have been running for about six weeks now, and the voltage remains stable after each recharge. I also appreciate that they do not heat up during the 10A discharge in my spotlight. Great product for the price.

I use these XTAR cells in my Wurkkos FC11 for evening walks around my neighborhood in Kuala Lumpur and in a small desk lamp during study sessions. They perform well and the capacity is genuine—I got about 3,880mAh on my LiitoKala Lii-500 tester. The only reason I am giving four stars instead of five is that the flat top can be a bit finicky in certain chargers that prefer button tops. But for devices with proper contacts, they are excellent.

Alles Bestens!

I bought two of these cells for my ThruNite TC15 and a small portable fan I use during summer heatwaves in Montreal. The performance is solid—my fan runs for about 8 hours on a single charge. Capacity tested at 3,880mAh on my Opus BT-C3100, which is slightly below the 4000mAh rating but still acceptable. I wish XTAR included a storage case, but the cells arrived well-packaged in individual blister packs. Good value overall.

I purchased these XTAR 18650 cells for my husband's Fenix HM65R headlamp and my own Nitecore HC65. We both use them for evening reading and DIY projects around the house. After a month of regular use, the cells are still performing like new. The 4000mAh capacity is a noticeable improvement over our old 3000mAh cells. I appreciate that XTAR publishes honest capacity ratings—these actually deliver what they promise. Shipping to Warsaw was faster than expected.

Compré estas celdas XTAR para el sistema de respaldo de energía de mi router en casa y para una lámpara de camping que uso en el patio. La capacidad de 4000mAh es real—lo verifiqué con mi cargador Nitecore UMS2. En mi router, una sola celda dura aproximadamente 4 horas durante cortes de luz. El único detalle es que la funda blanca se ensucia fácilmente, pero eso no afecta el rendimiento. Buena relación calidad-precio.

Saya menggunakan baterai XTAR 18650 ini di lampu sepeda saya dan senter kepala yang saya pakai untuk bekerja di gudang rumah. Kapasitas 4000mAh sangat cukup untuk pemakaian sehari-hari, dan saya sudah pakai lebih dari satu bulan tanpa masalah. Pengisian daya cepat dengan charger XTAR SC1 saya. Harga terjangkau untuk kualitas seperti ini. Saya akan beli lagi untuk cadangan.

Compré estas células XTAR 18650 para mi linterna Fenix TK16 y para un proyecto de radio portátil que estoy construyendo en casa. Después de tres semanas de uso, la capacidad real medida con mi cargador XTAR VC8 es de aproximadamente 3.950mAh, muy cerca de lo anunciado. La descarga de 10A es más que suficiente para el modo turbo de la linterna. El precio es excelente comparado con otras marcas premium. Las recomiendo sin dudar.

I was skeptical about a 4000mAh 18650 because many brands exaggerate their capacity, but these XTAR cells actually deliver. I tested them on my SkyRC MC3000 and got consistent readings of 3,920–3,980mAh across four cells. I use them in a bedside reading lamp and a small Bluetooth speaker that I keep in the kitchen. They charge quickly and do not get warm during use. For the price, these are easily the best value 18650 cells I have bought in years.

J'utilise ces cellules XTAR 18650 dans ma lampe frontale Petzl et dans un petit ventilateur USB pour mon bureau à la maison. Après un mois d'utilisation quotidienne, elles tiennent parfaitement la charge et la capacité réelle est très proche des 4000mAh annoncés. Le déchargement continu de 10A est largement suffisant pour mes besoins. Livraison en France en douze jours, emballage soigné. Je recommande vivement ces batteries à tous ceux qui cherchent des cellules fiables sans se ruiner.

I am a flashlight enthusiast and have tested dozens of 18650 cells over the years. These XTAR 4000mAh cells are among the best budget options I have found. I ran a full capacity test on my Zanflare C4 and got 3,945mAh, 3,960mAh, 3,912mAh, and 3,938mAh across four cells—very consistent. They fit perfectly in my BLF A6 and Astrolux S43. The only caveat is that they are unprotected flat tops, so make sure your device is compatible. For the price, I would buy these again without hesitation.

These XTAR cells are excellent for the price. I use them in my Wurkkos TS30S and a small emergency radio I keep at home in Manila. We get typhoons regularly here, so reliable 18650 cells are a must. After two months of regular charging and discharging, the cells still test at around 3,900mAh. The 10A discharge handles the TS30S on turbo without any noticeable dimming. I have already recommended these to my friends.

I ordered six of these cells for my family's emergency preparedness kit here in Singapore. We use them in two Fenix flashlights, a portable radio, and a small camping fan. The 4000mAh capacity means fewer recharges, which is important during monsoon season power disruptions. I tested all six on arrival and every single one measured above 3,900mAh. XTAR has earned my trust. The flat top design fits perfectly in my Nitecore UMS4 charger.

Ich nutze diese XTAR 18650 Zellen in meiner Fenix PD36R Taschenlampe und in einem selbstgebauten Powerbank-Projekt für mein Homeoffice. Nach vier Wochen täglicher Nutzung bin ich sehr zufrieden: Die Kapazität liegt bei etwa 3.950 mAh, gemessen mit meinem XTAR Dragon VP4 Plus Ladegerät. Die 10A Entladung reicht locker für die Turbo-Stufe meiner Lampe. Besonders gut gefällt mir, dass die Zellen auch nach mehreren Ladezyklen kaum an Leistung verlieren. Klare Kaufempfehlung für Bastler und Flashlight-Enthusiasten.