This is the Ofna 1400mAh 5-Cell 6-Volt NiMH Flat Battery Pack.

Features:

• Side by side cell configuration, ideal where space is a concern
• Five cells wired in series

Includes: 1400mAh 5 Cell Flat NiMH Battery Pack with Universal Connector

Specifications:
Capacity: 1400mAh
Number of Cells in Series: 5
Rated Voltage: 6.0V
Pack Dimensions: 3.2 x 1.1 x 0.71" (81 x 29 x 18mm)
Weight: 4.4oz (125g)