The board has:David1975;14357495 said:
- Over/under Voltage protection
- Over Current protection
- Reverse polarity protection.
HOWEVER, the battery is not protected. If something in your Mod (like a broken wire) creates a dead short then an un-fused battery might give up the smoke.
Furthermore, "Reverse polarity protection" only protects the board. In a single battery configuration thats all you need for reverse polarity, BUT if you are running dual batteries and insert one backwards then one or both batteries may give up the magic smoke. Fusing each battery would protect against this.
Fuses are insurance, you need to evaluate your own personal tolerance for risk.
- This is where the chemistry of the battery you are using comes into play. Use a nice safe IMR chemistry and the only risk is that you lose a battery (tolerable). However if you are using a big fat 6400mAh Lipo then smoke and flames and violent out-gassing is possible when shorted (unacceptable). I personally love Lipos but I would ALWAYS fuse them in any of my own Mods!
- Personally, if I were using a single 18650, and I was confident in my soldering skills (which I am) I would not fuse a single battery Mod with this board. I would fuse both batteries of a dual 18650 Mod though.
As for fuse rating, depending on what fuse you used for your DNA30, maybe! The DNA30 only required a 12A fuse. The specs for the DNA40 call for a 16A battery minimum, therefor your fuse should be at least 16A. So the 14A fuses from the Tibs co-ops (for example) would be a little shy. They might work but you would be on the edge.
© Mike Petro, 2014.
Unauthorized use and/or duplication of material without express and written permission is prohibited.
Excerpts and links may be used, provided they are verbatim, and that full and clear credit is given to Mike Petro, including source link.
