User manual

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The integrated safety electronics ensure that the rechargeable battery is not
overcharged nor enters undervoltage when discharging, and switches off the
connection to the rechargeable battery contacts.
Thus, you can easily experiment with rechargeable batteries of mobile
phones while the upper and lower temperature limits and the maximum
charging current (1C) are not exceeded.
The charging circuit for charging a lithium rechargeable battery with the USB
source is built with very simple components on the plug board. The voltage that is
stabilised to 5 V with the USB source must be reduced to a compatible charging
end voltage of barely 4 V. The LED ensures that the idle voltage (without recharge-
able battery) at the output does not rise above 4 V by a low current consumption.
The charging current is also controlled by the components and will reduce with
increasing charge/
rechargeable battery voltage. Even through this simple charging circuit works, this
is a charging equipment and you must not use any comfort charger.
The contacts of the lithium rechargeable battery can be connected to the alligator
clamps. Depending on rechargeable battery type, this will work more or less well.
It would of course, be most reliable to solder two cables to the gold contacts if you
have soldering equipment at hand. Otherwise, you can lift the upper area of the
rechargeable battery where the contacts are off the rechargeable battery body
slightly so that the terminals will be attached between the contact strip and the
rechargeable battery body.