See what I wrote below- hope you guys dont mind me quoting you in
my email (i needed "evidence" to back me up and get them to take
this seriously)
Warren.
EMAIL TO LENMAR STARTS HERE
Hello, I purchased a Mach1 speedcharger from batterybarn.com for my
Canon Powershot G2 7.2v Li-Ion batteries (BP-511 and equivalent)
and am deeply concerned over apparently accurate and verifiable
user claims that the Mach-1 does not in fact supply the batteries
with a full 100% charge. It is claimed the Mach-1 "accelerates" the
charging process and claims the battery is "full" when in fact a
normal charger would then revert to normal "trickle"-style top-up
charge for several hours (e.g. on my G2 the orange light glows
constantly).
I think you need to either provide proof this is
not the case, or
change your misleading advertising and provide full refunds
including cost of shipping for all your customers who have been
duped into buying a charger which does
NOT perform as claimed by
Lenmar.
I purchased the Mach-1 believing it could give my BP-511s a full
charge in around 30-45 minutes instead of the 3 hrs it takes in my
G2. The Mach-1 has little or no value to me if this is not the
case, and the Mach-1's "full" charge is only equivalent to the G2's
"preliminary" charge (70% power in 1 hr, remaining 30% in next 2
hrs).
PLEASE READ THE POSTS ON THE DPREVIEW.COM FORUMS BELOW.
PLEASE REPLY ASAP.
There are many other users on dpreview.com demanding an
explanation!!!! I have posted a copy of this email so they can be
kept up to date on this serious issue. If you cannot provide a
satisfactory explanation/proof of performance we will have to take
this matter further. Thankyou for your time.
Annoyed customer
Warren Prasek
Text below is copied from:
http://www.dpreview.com/forums/read.asp?forum=1010&message=2209229
***
http://www.buchmann.ca/Chap4-page8.asp
The charge time of all Li-ion batteries, when charged at a 1C
initial current, is about 3 hours. The battery remains cool during
charge. Full charge is attained after the voltage has reached the
upper voltage threshold and the current has dropped and leveled off
at about 3 percent of the nominal charge current.
Increasing the charge current on a Li-ion charger does not shorten
the charge time by much. Although the voltage peak is reached
quicker with higher current, the topping charge will take longer.
Figure 4-5 shows the voltage and current signature of a charger as
the Li-ion cell passes through stage one and two.
Some chargers claim to fast-charge a Li-ion battery in one hour or
less. Such a charger eliminates stage 2 and goes directly to
‘ready’ once the voltage threshold is reached at the end of stage
1. The charge level at this point is about 70 percent. The topping
charge typically takes twice as long as the initial charge.
I tried 2 samples of the Mach 1 Li ion speed chargers and I found
that niether of them charges the Canon 511 batteries fully and
consequentlly doesn't last as long as when charged in the G2. The
"fully charged voltage" when charged by the Mach 1 (after 30mins,
according to specs and indicator lights) is lower than that when
charged by the G2 itself. As a result I now usually finalize the
Mach 1 charge using the G2. This takes another 2 hours or so in the
G2. A pity.
I don't know if I got two sub-performing charger or not. Battery
Barn provides excellent service but I may try to contact Lenmar
directly to ask about this. Another problem is that the cigarette
lighter adapter tip has some ridges on it which caused it to get
stuck in my cigarette lighter recepticle in my 4Runner. The adapter
plug came apart and the tip is still in my car!
Any one else having this problem??
--
a l b e r t
--
MSChecan
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i was gonna type something witty here but then i changed my mind.
