Hams looking for an outdoor rugged laptop have been Panasonic CF-31 Toughbooks for years since they are available used for reasonable prices and are capable of running Windows 10. Besides general ruggedness, their best feature is their full daylight readable screen. Panasonic produced the CF-31 beginning in 2012, and it used the same CF-VZSU46 87 Watthour battery that was used in earlier models.
Since many CF-31s were used in public service vehicles, their battery, although old, is often lightly used. I have several batteries that are well above 90% original capacity despite being more than a decade old.
To decode when your battery was made, check the label in the lower-left corner. In the photo below, it reads “BC7A”. The first digit is the year (9=2009, A=2010, B=2011, etc). The second digit is the month (9=Sept, A=Oct, B=Nov, C=Dec). So a BC7A battery was made in December of 2011
