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.

Works as advertised. Great for my device since one battery lasts all day

If the device you are using 21700 batteries in has a very tight size tolderance then these might not fit. They are just a bit taller and fatter than other 21700 batteries I have used. These will not fit in 4 out 5 of my devices. So far they appear to be good in use but I have not seen any indication that they are longer lasting. The 5000mAh does not refer to the amount of charge. It refers more to how many times they can discharge and be recharged, just for you to know.

Batteries worked great no issues

These work great!

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

Nice

I purchased as a backup for my dive flash light.. wurkkos dl30. On high the original wurkoss battery does get about the hour and a half as the manufacturer says. This battery lasted about 40 minutes I only got half the usage out of it compared to the original battery that came with the flashlight.... I knew not to expect much from a generic battery but this was even less than I'd hope for.. And when you're using it for a dive light it's important to meet the specs provided with the generic battery And this does not..