When you're looking for cartridge batteries for your dab pen, there are several key features to consider:

1. Voltage: Ensure the cartridge batteries have enough power for your cartridge. Some cartridges, especially those with ceramic coils, require higher voltages .

2. Auto Draw vs. Button Activation: Auto draw cartridge batteries are more convenient as they fire when you inhale, whereas button-activated batteries allow you to pre-heat your coil .

3. Battery Capacity: This is measured in mAh and determines how long your battery will last between charges. Higher mAh batteries last longer .

4. Portability and Stealth: Some cartridge batteries are compact and discreet, which can be ideal for on-the-go use .

5. Durability: Look for cartridge batteries with a sturdy build that can withstand regular use .

6. Charging: Check if the cartridge batteries come with a USB charger for easy charging .

7. Price: Cartridge batteries are typically affordable, with many options between $10 and $50 .

Some of the best cartridge batteriesinclude:

- Yocan UNI PRO: Known for multiple voltage controls and improved design .
- Ccell Palm / Ccell Silo: These hand-held designs offer auto draw functionality and are convenient for on-the-go use .
- o.penVape 2.0: Recommended for those who prefer auto draw batteries; it's dependable and easy to use .
- EVOD Twist VV: A good option for button-style batteries, this battery is highly recommended for its performance .

For the best performance and longevity, always use a charger that is compatible with your device and avoid overcharging or using low-quality cartridge batteries. Regular maintenance, such as cleaning the connection points with isopropyl alcohol, can also help extend the life of your cartridge batteries .