Are these batteries compatible with vape pens?

Hey Angela, I used those in my shaver regarchabke battery and I cannot comment specifically to your question. The battery was no use to me because it gets over heated.

What is the voltage per battery ? How many do I need to create an 18volt battery pack ? Thanks

The batteries have 1.2V per cell. An 18V battery pack would require 15 cells in series.

Is there solder tabs on the bottom as well as top? Can't tell by the picture but I assume there are on the bottom?

Yes, they have solder tabs on both ends. Also, the tabs are both facing the same direction, which made making a battery pack a little more difficult. Great batteries though!

Can i use 1600mah instead of 850mah i am trying to replace?

Yes you can. When it comes to batteries, you can go up in amperage but not down. The device you're putting it in has a rating on it. If you go lower, it will "die" faster. With the higher amperage, it will last longer.

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Tenergy AA 1.2V NiMH 2000mAh Flat Top Rechargeable AA Batteries with Tabs, 4 Pack

Product ID: 11110091

Details

Battery Capacity
2000
Battery Cell Composition
NiMH
Brand
Tenergy
Number of Batteries
4 AA batteries
Recommended Uses For Product

⚡1000 recharge cycles

🔋2000mAh high capacity

🛠️pre-welded soldering tabs

S$21

Duties & taxes included

In stock

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Description

🔋 Recharge smarter, last longer—power your essentials like a pro!

BUILT TO LAST - Recharge up to 1000 times—these batteries pay for themselves after just 10 charges.
VERSATILE RELIABLE - Ideal for grooming tools, cordless vacuums, rotary tools, and more—upgrade your gear instantly.
EFFORTLESS INTEGRATION - Pre-welded soldering tabs make battery pack repairs and custom builds a breeze.
POWER THROUGH YOUR DAY - 2000mAh capacity delivers long-lasting energy for all your essential devices.
MEMORY FREE PERFORMANCE - NiMH chemistry ensures no memory effect, maintaining peak power every charge.

Tenergy AA 1.2V NiMH 2000mAh rechargeable batteries come in a 4-pack with flat tops and pre-welded soldering tabs, designed for easy battery pack repairs and custom builds. With a high capacity of 2000mAh and up to 1000 recharge cycles, these NiMH batteries deliver reliable, memory-free power for a wide range of electronic devices, from grooming tools to cordless vacuums.

Specifications

ASIN	B00CR0R8KQ
Amperage	0.5 A
Antenna Location	Indoor/Outdoor
Battery Capacity	2000 milliamp_hours
Battery Cell Type	NiMH
Battery Weight	3.84 ounces
Best Sellers Rank	#118,501 in Health & Household ( See Top 100 in Health & Household ) #276 in AA Batteries
Brand	Tenergy
Customer Reviews	4.5 4.5 out of 5 stars (619)
Manufacturer	Tenergy
Model Name	AA Flat Top With Tabs
Model Number	96057
Number of Batteries	4 AA batteries required.
Reusability	Rechargeable
UPC	045635216747
Unit Count	4 Count
Voltage	1.2 volts

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