Ive been trying to look up whether it is ok to use an 10440 battery inside the lumintop tool
you can, but there are issues you need to account for because
that question does not have a simple yes no answer… more like, yes if you observe several safety precautions
1. The light will not decide for you, when the 10440 is reaching overdischarge levels, there is no built in overdischarge protection
2. That means the operator has to decide when to stop discharging, or use protected cells
3. Overdischarging LiIon is bad. If you already know that, and already take resposibility for not overdischarging unprotected LiIon in UnProtected Lights.. then yes, the Tool will work with LiIon
4. The light will not decide for you when it is getting too hot, there is no built in Thermal Protection.
5. That means the operator has to decide when to stop letting the light get hot.
6. Overheating is bad. It can hurt you, and hurt you light.
etc
my personal journey led to this thread.. you may find it useful, it includes posters who use LiIon in Tools:
10440 LiIon in lights not rated for LiIon, pros and cons?
here is a post by a contributor to the above thread that uses
10440 in a current controlled Tool
Originally Posted by jon_slider
... The Maratac, Lumintop Tool (Copper, Alum, Ti, Rey Light Tool (Copper and Ti) and Worm (Copper, Stainless and Alum) in their present versions all use the same NoPwm driver afaik. I would expect them to react the same way. ...
I own all of these models (including all PWM and noPWM Maratacs) and they work perfectly with 10440 in my experience, YMMV
since then, it has come to light that the TiTool becomes HiMode only on 10440, until voltage drops to 3.6v.
there is more info about the use of 10440 in both copper and TiTools in this review:
Lumintop Tool AAA Copper + Titanium measurements (Nichia 219B)
Now answer me this
Why would you want to run LiIon in an AAA light that is not rated for the voltage, and has no protection(s), when the runtime on high is only about 10 minutes?-)