PILA batteries are Lithium Ion rechargeable cells that can replace
123A lithium disposable cells. They make two versions - the P version
which is designed specifically for Pila brand lights, and an S version
which works in many other brands of lights. 600S or 600P replaces
two 123A cells, while two 300S or 300P replaces three 123A cells.
The cells are about 4.2 Volts each, so 6V lights (2 cell) are driven
at 4.2V, and 9V lights (3 cell) are driven at about 8.4V. In regulated
lights you will often get the same output as when using 123A cells.
Unregulated lights tend to be a little dimmer than normal.
The advantage here is great savings compared to using disposable
The table below lists compatibility between various lights I have
tested and the Pila cells. Please see the PILA
review for more information about these batteries.
Note that the 600 series was previously named "168" and
the 300 series was previously named "150". The cells were
upgraded to higher capacity in late 2005.
Fits = Pila batteries fit in the light body
tube. Works = Light operates with the Pila batteries installed,
but output may be reduced.
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Very tight fit - may or may not work
Too long for the light to close properly
3 Pila cell is too wide
4 Dents the + side of one Pila battery slightly
* Requires a special spring to function - see PILA
** Requires a Radio Shack part # 64-1895 (1/8" rare earth disk
magnet) be attached to positive terminal of battery to work.
*** Must be inserted from the HEAD end of the flashlight, not the
Note that the information contained in this table
is not a guarantee of compatibility.