Battery holes, visualized from side.
|Suggestion: remove one of the clasp pins to make the battery change easier and less likely for you to damage the band.
Button Cells: The positive(+) side is the flat side with the printing on it, the "nipple" shaped side is negative(-). The picture to the left represents the battery holes/ports. If there are no markings, there may be a bevel in the bottom corner of the side that requires negative(-) down - see picture to left.. When holes are marked with polarity, that means the side of the battery of that polarity, goes down, against the contact - EXCEPTION IS URANUS modules, READ BELOW!!. Reversing the polarity, even for a fraction of a second, will generally kill your module permanently...the infamous, "cell reversal damage". 🙁
Larger batteries A,AA,AAA,C,D,N are polarized the opposite of button cells - the protruding "nipple" end is the positive/+ side. Please be careful when loading batteries into vintage equipment. If there is a spring contact and a flat contact presenting themselves, put the spring contact in contact with the negative(non-nippled) end of the larger batteries A-N..
|Uranus modules. Uranus modules do not have a bevel in the bottom of either of the battery holes and are marked adjacent to each hole on the plastic of the module (some have no markings), + by one, - by the other. This means the +(positive) side should be UP in the hole marked +. This is contrary to all other manufacturers (that I am aware of).....I wonder how many Uranus watches have been killed by improper insertion.
Other polarity clues:
- Largest contact is positive(+).
- A contact on/in side of battery port - negative goes down (see next item).
- The side of a button cell is positive(+).
- Button cells that get stacked(e.g. 2 #386 in some early Benrus and Helbros), go in negative down.
LCDs that require two batteries, generally have both negative side down, particularly if both have a side contact.
Larger batteries (camera, AAAs and larger),generally positive at "nipple" end.
Uranus modules. Uranus modules do not have a bevel in the bottom of either of the battery holes and are marked adjacent to each hole on the plastic of the module (some have no markings), + by one, - by the other. This means the +(positive) side should be UP in the hole marked +. This is contrary to other manufacturers.