Yes. Battery replacements are available through the manufacturer. You can contact them here. 

Scanfob Brand barcode scanners (Scanfob 2002/2005/2006/3002i/4000)— Hold down BOTH the large and small buttons on the Scanfob simultaneously for 30 seconds. You will see a red LED and hear a single-tone beep upon completion. Scanfob BB2 scanners (Scanfob Ultra-BB2/NFC-BB2) — Hold down the power button for six seconds. If your device is still unresponsive, let the battery drain completely and then charge it and try again. Scanfob qID Mini — Hold down BOTH buttons simultaneously for six seconds, then release.

Barcodes (sometimes called barcode symbologies) are visual representations of data encoded in a machine-readable format that is recognized by the International Organization for Standards (ISO) and GS1. Barcode symbologies — generally speaking — come in two forms: 1D (one-dimensional) and 2D (two-dimensional). 1D barcodes were the first type of barcode to be standardized and consist of white and black spaces of varying widths that depend on the specific symbology’s standards. 2D barcodes were later introduced as a solution that could store a considerably larger amount of data than one-dimensional barcodes.