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[Robert K. Meyer]

Here are some tests I ran about a year ago on my two GPSs. The current
drain is approximate using a cheap analog meter. My cheap digital meter
would not work because the internal resistance was too high.

The PowerEx cells came from Thomas Distributing (good cells). The
Power2000 cells came from B&H Photo (poor cells). These two brands were
weighed in grains. The newer Energizers seem to be OK. Older ones had a
very high self-discharge. The cells were also charged and allowed to
self-discharge for 30 days. Below are the results.

For chargers, I generally use the small Energizer charger that was
included with some of the 2500 mAH cells. It has a timer that shuts off
after 8.5 hours and pumps in current at 360 mA. I also use a larger
RayOVac PS3 universal charger that shuts off when done. They are no
longer sold. This charger also charges the recharges rechargeable
alkelines which are no longer available. Recharging standard alkelines
works for a time or two, but then you will have a very leaky mess from
the cell. Not a good idea.

VistaC Drain      mA
   Normal          75

   2500 mAH Energizer 28hrs  (27hrs/30days)
   2700 mAH PowerEx   34hrs  (30hrs/30days) 424gr
   2700 mAH Power2000 23hrs  (17hrs/30days) 469gr
   Lithiun e2         32hrs
   Alkeline           28hrs
   2500 mAH           25hrs
   1600 mAH           16hrs

GPSMap76 Drain    mA
   Normal         160

   2500 mAH Energizer 16hrs (17hrs 30 days)
   2700 mAH PowerEx   21hrs (20hrs 30 days)
   2700 mAH Power2000 15hrs (10hrs 30 days)
   Lithiun e2         18hrs
   Alkeline           18hrs

Bob

lloo at att.net wrote:
> Does anyone have specific recommendations for AA rechargables that I might also order for my daughter ... or are all 2400-ish mAh cells pretty much cookie cutter items?  Thx.

-- 
R.K. Meyer MSEE K7PPC http://www.rkmeyer.com
In the beginning...  Genesis 1:1 John 1:1 AV