Neware provides various kinds of battery clamps, such as: universal holders, alligator clips, polymer clamp, ring terminal connector and other types specified by customers. Here, only the common 4 types listed below for your reference.
1. Universal holder
For any batteries with their polar on the other sides, and the battery case is hard enough for the clamp.
Basically, there are 2 types of voltage sensing probe – sharp and round, and 2 types of polarity layout-positive up and positive bottom.
This provides you 4 options for your choice.
Sharp voltage sensing probes may leave visible but harmless scratches on the battery, but provides you better contact with the battery. 
2. Alligator clamp
2 couples of wire provided for 4-wire connection – Voltage and current couple. Normally, the bolder wires present current cables, red stands for positive, black for negative.
3. Polymer clamp.
This is specially designed for polymer battery, providing good operation and contact with battery tabs, and also causing no distortion for battery tabs.
There are many kinds of polymer clamps available for you to choose, the main differences exist in the current range the clamps can handle, though the outlooks seem alike. So if you need some specific current polymer clamps, please do contact with us, to be sure that you choose the proper clamps for your battery testers.
4. Ring connector.
Sometimes, for the safety or other reasons(such as the battery is heavy to lift or put on the table or drawer), then leave the batteries on the ground is a default choice for many people, in this situation, ring connector is helpful, because ring connector comes with long wires(normally the length of the wire can be 3 inches or up to 6 inches).
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