| 摘要 |
A battery adapter (1) enables the use of a small size battery, such as an AA size battery (4), in a battery compartment designed to receive a larger battery, such as a D size battery. The battery adapter (1) has a two-part casing (11, 12) with an annular wall (121) formed in the base of the lower casing (12) to receive and support the small size battery (4). The negative pole of the battery (4) is engaged with a helical spring (123) conductively connected to a negative plate (122). A positive pole (5) is inserted into the adapter casing (11,12) to contact the positive pole of the battery (4). A number of differently sized battery adapters may also be arranged one within the other whereby, for example, an AAA size battery may be used where a D size battery is required. |
