Not a TriMetric, but for $20 might be worth trying out...
Bayite DC 6.5V-100V Digital ammeter voltmeter Amazon suggested this for me and I'm thinking for $20 I might just give it a try. Has very good reviews too.
Forum Discussion
CapnCampn wrote:
I was eyeballing this one: Meter
50A (others available), says it will do forward & reverse, also shows Ah.
Was concerned about display brightness though.
CC
Display is very bright and can also be turned off if you like.
