In order to optimize the life of your Kaliento hand warmer, we will give you few tips and knowledge, especially about the battery.
1 – Battery charge / discharge cycle
A cycle consists of using all that battery charge (100%) but not necessarily all at once. For example, you can use Kaliento for some practice in a day, using half its capacity then fully charge it. If you did the same thing in the next day, it would be counted a discharge cycle and not two. In order to maximize the product life, Kaliento is designed to perform 500 cycles.
2 – Memory Effect
First of all, it’s necessary to unfold a myth that persists in many peoples head. In lithium-based batteries there is no memory effect, this is a myth. It only applies to older Nickle-based batteries. So fully discharging and charging the battery is completely useless. The modern lithium battery can be charged regardless of its current percentage, given that it has absolutely no negative effect on its performance.
3 – Self-discharge
It’s a phenomenon in batteries in which internal chemical reactions reduce the stored charge of the battery without any connection between the electrodes. Kaliento is engineered with a lithium-ion battery, self-discharge is 3%~4% per month. I mean that a battery fully charge which is not using during one month will be around 96%.
4 – Deep discharge
This is one of the most important point and the best way to kill your battery. If a lithium-ion battery is discharged below 2.5 volts per cell, a safety circuit built into the battery opens and the battery appears to be dead. This is what’s happen when you got “LOW” battery signal on your LED screen.
Even if the device turns off, self-discharge leads the battery to a point of no return. Only one solution, do not store it empty and quickly reload it.
5 – Sensor and screen calibration
Handwarmer is designed with a sensor that allows players to know the exact amount of energy stored in %. However, due to the charging/discharging cycles, this sensor tends to be inaccurate over time. So to calibrate the gauge, it should be performed, in every 30 discharge cycles, a full discharge non-stop, followed by an also, non-stop, full charge.
6 – Prolonged storage
To store a battery for long periods of time, its charge capacity should be around 40% and it should be stored in a place as fresh and dry as possible.
7 – Should you leave your Kaliento plugged in?
The question is asked, “Should I disconnect my Kaliento from the power grid when not in use?”. This should not be necessary because charging stops when the Li-ion battery is full. Most users plug their hand warmer on power all the evening after a practice session, this is totally safe.
- When your device turns off because the battery is empty, quickly plug it.
- Keep it plug is safe, the charge will stop automatically.
- For long storage, charge capacity should be around 40%.
- You can recalibrate the gauge with a full discharge/charge cycle.