FESTO cordless drill CDD 12 battery holder

This is a replacement LiPo battery holder that can be used in place of the FESTOOL BP12C or BPH12C batteries for the FESTOOL CDD 12 ES or CDD 12 FX cordeless drills.The holder also includes a voltmeter to monitor the battery state and 4 magnetic bit holders.
#History
I have used several cordless drills but my favorite is still the FESTOOL CDD12 because of its ergonomic design which I have had for 17 years. I have replaced the batteries several times over the years but, somehow, they do not l