2467 battery, cleaning precautions

[jonpaul]

Hello all: Just opened a 2467 OPT 06, 10. SN B010xxx. ~3K HRs 150  cyc, Orig A1 U800, A5   thru hole

Incredibly it works fine, CAL is OK.   This is remarkable for a machine built in 1986, 33 YEARS ago!

I plan to recalibrate but for now,  just swap out the batteryand hope the CAL is preserved.

1/ Battery: Eagle Picher LTC-7PN 3.5V 750mah Keeper date code 2486.

Recommended replacement, the many Korea and China seem to be knockoffs.
Any source? Prefer  plastic or metal cases?

Any recommended desoldering precautions?
How to replace battery without data loss?

2/ Cleaning: in  2 never serviced, accumulated dust and dirt, especially near CRT and vent holes.

Should I use  air (vacuum cleaner, compressed air or freon air can) to blow out?
cotton/Q tips and IPA?

Very wary of static or physical damage.

Many thanks!


Jon