XTAR 21700 5000mAh 10A Rechargeable Battery 50E

Been using XTAR batteries for years and this 21700 5000mAh model is their best yet. The over-discharge protection has saved my expensive flashlights from damage multiple times. 70g weight feels solid and premium. If you're on the fence about protected vs unprotected, just get these – safety first!

Habe die XTAR 21700 Batterien mit dem SC2 Ladegerät getestet. Die Kapazität liegt tatsächlich bei über 5000mAh – die Werte stimmen! Mit 10A Entladestrom laufen meine Taschenlampen problemlos. Der integrierte Überladeschutz gibt ein gutes Sicherheitsgefühl. Absolute Kaufempfehlung!

These batteries are a steal at this price point. I compared them to premium brands costing twice as much and honestly can't tell the difference in real-world use. 5000mAh capacity, 10A discharge, built-in protection – everything you need and nothing you don't. XTAR has earned a loyal customer.

I've tested a lot of 21700 batteries for my YouTube channel, and these XTARs are consistently in my top recommendations. The 10A continuous discharge is reliable, the capacity is accurate, and the safety features are comprehensive. Plus, the price can't be beat for a protected cell with Samsung internals.

First time buying xtar 21700 battery. So far so good.

Battery in good condition, haven't been able to utilise it in a device yet but did a quick check and it came with a battery case which was nice

Using these in my off-grid solar setup as backup storage. The low internal resistance means minimal energy loss during charge/discharge cycles. Over 500 recharge cycles is a huge plus for sustainability. The button top design makes them compatible with a wide range of devices. Very versatile!

Upgraded from 18650 to these 21700 cells and the difference is night and day. 5000mAh capacity means my flashlight runs for hours longer. The low internal resistance really shows – less heat, more efficiency. These are now my go-to batteries for all my high-drain devices.

I use these in my vape mods and they handle 10A continuous draw like a champ. Zero voltage sag under load, consistent performance from full charge to cut-off. The 3.6V nominal voltage is spot on. Price is very reasonable compared to other protected 21700 options on the market.

Packaged well and all four cells arrived at exactly the same storage voltage (around 3.6V). Measured with my Fluke multimeter – consistent quality control from XTAR. These are now powering my portable power bank setup and I'm getting amazing runtime. Eco-friendly and cost-effective!

These XTAR 21700 batteries are absolutely fantastic! I tested the capacity with my Vapcell S4 Plus at 1A discharge and got over 5000mAh – the specs are no joke. They power my Acebeam L19 perfectly even at near 9A draw. Protected circuit gives me peace of mind. Highly recommended!

The 10A constant discharge current is perfect for my high-lumen tactical flashlights. I've tested these side by side with unprotected cells and the protection circuit adds negligible resistance – you barely notice the difference. Button top ensures solid contact every time. Will buy again!

I bought four of these for my high-power LED flashlights and couldn't be happier. The button top design fits snugly, and the 10A continuous discharge handles everything I throw at it. Built-in protection against over-charge and short circuits is a lifesaver. XTAR never disappoints!

These batteries are a game-changer for my camping gear. One fully charged 5000mAh cell keeps my headlamp running for an entire weekend trip. Rechargeable over 500 cycles means I'm saving money and reducing waste. The built-in short circuit protection is a great safety net in the backcountry.

I was skeptical about the 5000mAh claim at first, but my charger confirmed 5029mAh and 5036mAh on two separate cells. XTAR's specs are honest and accurate. These are hands down the best value protected 21700 batteries you can find. The Samsung cell inside is the real deal.

Finally found a protected 21700 battery that actually delivers 5000mAh! I've been burned by cheap knockoffs before, but XTAR uses genuine Samsung INR21700-50E cells inside. The protection circuit adds about 4-5mm in length (74.5mm total), so check your device compatibility first. Fits my Sofirn SP35 perfectly!

Perfect replacement for the stock batteries in my power tools. The 10A discharge rate gives my drill plenty of grunt, and the 5000mAh capacity means longer work sessions between charges. The protection circuit prevents over-discharge which killed my previous batteries. Highly recommend!

Using these in my diving flashlight and they performed flawlessly on a 3-hour night dive. The impact-resistant build and protection circuits held up perfectly against the pressure and moisture. Recharged over 500 times? At this rate, these will last me years. XTAR quality is top-notch.

Excellente batterie 21700 ! La capacité de 5000mAh est parfaite pour mes lampes torches LED. La protection contre les courts-circuits et les surcharges est un vrai plus pour la sécurité. Livrée avec une tension de stockage idéale de 3.6V. XTAR livre toujours des produits de qualité. Je recommande !

My husband and I both use these in our EDC flashlights. We've put them through hell – drops, rain, extreme temperatures – and they just keep going. The impact-resistant casing and protection circuits give us confidence that our lights won't fail when we need them most. 5 stars!

Bought six of these for my photography lighting equipment and they've been flawless. The consistent 3.6V output means my lights don't flicker or dim unexpectedly during long shoots. The 5000mAh capacity gets me through full wedding shoots without swapping batteries. Absolutely essential gear!

Batería 21700 de primera calidad. La capacidad de 5000mAh es real – lo comprobé con mi cargador. La protección contra sobrecarga y descarga profunda funciona perfectamente. Ideal para linternas de alta potencia y dispositivos exigentes. XTAR cumple siempre con lo que promete. ¡Muy satisfecho!

Ordering is easy; Shipping is prompt; Packaging is superior and Xstar batteries are solid performers. This was my second order. I highly recommend this retailer.