DQGG 21700 Rechargeable Battery 5000mAh 3.7V Li-ion Batteries 21700 Battery Flat Top 2 Pack for Flashlights Headlamps

If you’re serious about vaping — whether for relief, relaxation, or routine — the battery you choose is just as important as the device you use. And if you’re using high-powered mods or sub-ohm coils, then let me save you some trial-and-error: The DQGG 3.7V 21700 Flat Top Battery is the best upgrade you didn’t know you needed. This is a no-compromise battery designed to meet the demands of heavy daily use — and it handles it like a champion. I’ve tested countless batteries over the years, and very few match the consistency, longevity, and reliability this one delivers. ✅ PROS • Massive Power Capacity: With 4000mAh–5000mAh (depending on the model), this battery delivers all-day power for even the most power-hungry vape mods. • Fast, Clean Recharge Cycles: This cell doesn’t just hold a charge — it recharges quickly and efficiently without overheating or degrading. • High Drain, High Stability: Easily handles 20A to 30A discharge, which means you’ll get consistent hits and minimal drop-off, even during long chain-vaping sessions. • Thermal Management: This battery stays cool under pressure. Literally. Even after heavy usage, it doesn’t overheat — a sign of excellent internal chemistry. • Perfect Fit for Flat-Top Mods: If your mod calls for a flat-top 21700 battery, this one fits snug and secure — no wiggle, no mess. • Durable Construction: The casing is solid and impact-resistant — built for real-world use, not delicate display. • Reliable Safety Features: Overcharge protection, short circuit prevention, and stable chemistry give peace of mind — especially for beginners. ⚠️ CONS • Not Pre-Charged: Be sure to fully charge before first use — it ships at storage voltage. • Flat Top Only: Will not fit devices that require button-top batteries — check your device’s compatibility. • Larger Size: As with all 21700s, it’s bigger than the standard 18650 — not all vape mods will accommodate it. 👤 WHO IS THIS FOR? • Vapers Using Sub-Ohm or High-Power Mods • Veterans, Workers, and First Responders who need long-lasting, all-day vape support • Heavy Users and Cloud Chasers running builds that demand high amps • Battery Enthusiasts or Tech-Savvy Buyers who understand the value of internal resistance, cycle life, and stable chemistry • Anyone Switching from 18650s and needing longer life and stronger output 🏁 VERDICT If you vape daily — or rely on your mod to get you through tough shifts, long drives, or stressful days — this battery is worth every penny. The DQGG 21700 Flat Top Battery doesn’t just work — it performs like it’s got something to prove. Every session, every pull, every time. Highly recommended for serious vapers and those who value power, reliability, and peace of mind. It’s a true workhorse — just like you.

Using this 5000mAh 21700 battery in my high-lumen flashlight has been a game changer. The extended runtime is immediately noticeable — I get several long sessions out of a single charge, even on turbo mode. It fits snugly and works perfectly with my light’s onboard charging system without any issues. The build quality feels solid, with no cheap wrap or loose terminals. I’ve used it in both hot and cold conditions, and performance has remained consistent. Great for camping, night work, or emergency kits where reliability really matters. Holds a charge well even after sitting unused for a few weeks.

These batteries work great but I gave it a four-star rating because the wrap on them came off fairly quickly compared to most of my other batteries. Given I use them daily or around about that much. I alternate them with another set. But they do hold charge well and work perfect for what I need them for. Just wish I didn't already have to buy wraps

These work great!

Budget friendly long-lasting batteries

Batteries ok. Seems to loose output power at about 25%.

Nice

Update: so after only a few weeks these batteries didn’t last. They would die way faster than any other ones I’ve ever had and I noticed, with other batteries my vape feels like the same power until the batteries get very low, like down to 10 %. These batteries seem to lose their power too. Don’t buy! I use these in my vape and they are the large size for single battery vapes and you don’t have to use any adapter or sleeve. They are powerful, last the longest of any battery I’ve tried before, and the power seems to be consistent. I don’t notice a difference until the battery life gets low/almost dead.