Vapcell M35A 18650 3500mAh Blue Rechargeable Battery
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Refund policy
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
To start a return, you can contact us at support@londonvapestore.co.uk. Please note that returns will need to be sent to the following address: 26 Alder Close, Erith, Da18 4aj
If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
You can always contact us for any return question at support@londonvapestore.co.uk.
Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.
Unfortunately, we cannot accept returns on sale items or gift cards.
Exchanges
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.
European Union 14 day cooling off period
Notwithstanding the above, if the merchandise is being shipped into the European Union, you have the right to cancel or return your order within 14 days, for any reason and without a justification. As above, your item must be in the same condition that you received it, unused, and in its original packaging. You’ll also need the receipt or proof of purchase.
Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 10 business days. Please remember it can take some time for your bank or credit card company to process and post the refund too.
If more than 15 business days have passed since we’ve approved your return, please contact us at support@londonvapestore.co.uk.
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PRODUCT DETAILS
Vapcell M35A 18650 3500mAh 20A Battery
18650 Li-ion · 3500mAh capacity · 20A continuous discharge · 3.7V nominal · Blue wrap · Rechargeable · Compatible with most 18650 vape mods.
The Vapcell M35A is a high-capacity, high-drain 18650 Li-ion rechargeable battery delivering 3500mAh capacity with a 20A continuous discharge rating — a strong combination that suits regulated mods and sub-ohm vaping at higher wattages. Compatible with the vast majority of vape kits that require external 18650 batteries, the M35A offers all-day vaping performance in a standard flat-top 18650 format. Browse our full Batteries & Chargers range for all available cells and chargers.
Key Specifications
🔋 3500mAh Capacity
High capacity 18650 cell — 3500mAh provides excellent battery life for all-day vaping in regulated mods, reducing how often you need to swap or recharge cells
⚡ 20A Continuous Discharge
20A CDR — higher discharge rating than many 3500mAh cells, making the M35A suitable for regulated mods at higher wattages and more demanding sub-ohm builds
🔌 3.7V Nominal Voltage
3.7V nominal voltage — standard 18650 voltage profile compatible with all regulated 18650 vape mods and dual-battery devices
🔧 Li-ion Rechargeable
Rechargeable Li-ion cell — charge via a dedicated external charger or the mod's built-in USB charging circuit. Replace every 2 years or when capacity noticeably degrades
📌 Standard 18650 Format · Blue Wrap
Standard 18650 dimensions compatible with the vast majority of 18650 vape mods. Distinctive blue PVC wrap for easy identification
📱 Wide Mod Compatibility
Compatible with most vape kits that require external 18650 batteries — single and dual battery regulated mods, box mods, and tube mods
More 18650 Batteries
Vapcell's 3000mAh 15A cell — ideal for moderate wattage regulated mods
High-drain 18650 cell from Molicel — popular for high-performance vaping
High-capacity 18650 cell at 3800mAh — ideal for maximum battery life
3800mAh 18650 high power cell from Fogstar Energy
4000mAh 18650 — maximum capacity option in the Fogstar range
Browse all 18650 cells and chargers
Technical Specifications
| Brand | Vapcell |
| Model | M35A |
| Battery Size | 18650 |
| Chemistry | Li-ion (rechargeable) |
| Nominal Voltage | 3.7V |
| Capacity | 3500mAh |
| Continuous Discharge Current (CDR) | 20A |
| Wrap Colour | Blue |
| Weight | 100g |
| Ideal For | Regulated box mods, sub-ohm devices, single and dual 18650 battery mods |
Educational Guide: 18650 Batteries & Battery Safety
What Is mAh and Why Does It Matter?
mAh stands for milliampere hour — the unit used to measure a battery's capacity. A higher mAh rating generally means longer battery life between charges. The Vapcell M35A's 3500mAh capacity is on the higher end for 18650 cells, making it a strong choice for frequent vapers who want to go longer between charges. Battery life also depends on the wattage the device is running at — higher wattages drain the battery faster regardless of capacity.
What Is CDR and Why Does the M35A's 20A Rating Matter?
CDR (Continuous Discharge Rating) is the maximum current a cell can safely deliver continuously. At 20A, the M35A has a higher CDR than many high-capacity 18650 cells — most 3500mAh cells are rated at 10–15A. This makes the M35A a versatile cell that suits both moderate and higher-wattage regulated mods without compromising safety margins. Never use a cell beyond its CDR rating.
How Does the M35A Compare to the Vapcell K30?
The Vapcell K30 offers 3000mAh at 15A CDR — a solid mid-range cell for moderate wattage use. The M35A steps up to 3500mAh and 20A CDR, making it the better choice for users who want more capacity and higher discharge headroom. For even higher capacity, see the ODBXT 3800mAh and Fogstar Energy 4000.
Why Stock Multiple 18650 Cell Options?
Different customers have different needs — some prioritise maximum capacity, others need a higher CDR for demanding builds, and some want the best value cell for their regulated mod. Stocking a range of 18650 cells across different capacity and CDR profiles ensures you can serve the full spectrum of vaping customers. Browse the full Batteries & Chargers range for all available options.
Frequently Asked Questions
What is the capacity of the Vapcell M35A?
The Vapcell M35A has a capacity of 3500mAh — on the higher end for 18650 cells, providing excellent all-day battery life in regulated mods.
What is the continuous discharge rating?
The Vapcell M35A has a CDR of 20A — higher than many 3500mAh cells, making it suitable for regulated mods at higher wattages.
What vape mods is the M35A compatible with?
Compatible with most vape kits that require external 18650 batteries — including single and dual battery regulated box mods, tube mods, and sub-ohm devices.
How do I charge the M35A?
Charge via a dedicated external Li-ion battery charger or via the mod's built-in USB charging circuit. Always use a charger rated for Li-ion cells. Never leave charging batteries unattended.
How long will the M35A last before it needs replacing?
Replace every 2 years or when you notice a significant drop in capacity — whichever comes first. Never use a battery with a damaged or torn PVC wrap.
Battery Safety Tips
- Always use a battery charger rated for Li-ion cells
- Use a battery case to transport batteries safely — never carry loose in a pocket or bag
- Never leave a battery on charge unattended
- Keep batteries away from extreme heat, direct sunlight, and moisture
- Do not completely discharge Li-ion batteries — recharge before they reach 0%
- Never use a battery with a broken, torn, or damaged PVC wrap — rewrap or replace immediately
- Replace batteries every 2 years or when capacity noticeably degrades
- Do not short circuit, crush, puncture, or disassemble batteries
- Only use in regulated devices with appropriate protection circuits
⚠️ Important Safety Warning
18650 rechargeable Li-ion batteries can be dangerous if used improperly. Always use in regulated devices with appropriate protection circuits. Never use in mechanical or unregulated mods without thorough knowledge of battery safety. Do not short circuit, overcharge, over-discharge, crush, puncture, or expose to extreme heat. Never use a battery with a damaged wrap. The buyer assumes all associated risks.