Unusual readings - failing batteries??

From another thread:

sanguine said:

I don't think that will help to be honest Bluetit - the solution is only to test if the meter and strips are within (a fairly wide) range, they are not a fixed standard solution of specific value. But I do sometimes wonder how long the batteries last on the meters and if they start going haywire when they're running low.
5.7 at 5:30 am today, after 6.8 the night before. Even with having to have a few chips with dinner to provide a base level of calories out here in Cote d'Ivoire. Nice eggs, ham and salads though.

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@sanguine
Rod. I have some evidence this evening to show you may be correct about failing batteries.

Two days ago my meter flashed up a warning that the batteries were draining and I had enough for approximately 50 tests. I have carried on using it, and all seems to be working normally - no obvious problems. Then, this evening I tested pre-prandial at 4.8. I have had 4's at this time a few times but tested twice to be sure. Similar reading.

1 hour after it read 4.7. Tested twice more - 5.0 and 4.8. Considering I had 6 chips with my bacon, eggs, toms and mushrooms I was very confused.

2hrs after I tested again. 4.6. Very confused.

I changed the batteries immediately and tested twice more. 6.3 and 5.8. More like the readings I was expecting.

Has this happened to anyone else? Any comments?