Mostly I write reviews, but once in a while I also writes something else. Due to the large amount of reviews these articles can be difficult to find on the category pages. For this reason I have duplicated them here.
Batteries with ridiculous ratings
Battery charge termination test
Disassembly of 9V LiIon batteries
Disassembly of USB charged batteries
How does a usb charger work?
USB power information
How far can LiIon be discharged?
Disassembly of UltraFire 9900mAh 18650 battery
My charger do not charge LiIon to 4.2V, is it faulty?
Battery charging NiMH
A look at different charge methods.
A look at QI (Wireless power transfer)
Energy at low voltage in alkaline batteries
Disassembly of some UltraFire batteries
Nitecore chargers the i4 family and clones
Discharge protection test
Is my battery protected?
My lab setup
What equipment I uses and how it is arranged.
Disassembly of cheap 18650 battery
Comparison of AA battery chemistries
CR123A and rechargeable substitutes
Internal impedance/resistance of batteries
Rewrapping a battery
Estimating remaning capacity in LiIon batteries
Building a high current adapter
Measuring on a Flashlight
A illustrated guide on how to make the most common electrical measurements on a flashlight.
What is a Hobby Charger
A short explanation about hobby chargers and how to use them for flashlight LiIon batteries