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Old 11th July 2008, 20:10
ITSPETEINIT ITSPETEINIT is offline
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Location: Mere, Wilts
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Default Long Term battery test.

This is for anyone who would care to impart their knowledge/opinion to me.
I have 4 Lithium-ion Batteries made by the Phylion Battery Company and supplied with eZee Bikes;

Their details are as follows:………
No: 1 - S/N JFJEAF 100003 Supplied 19TH July 2006 with a new eZee Torq: the code suggests the battery was manufactured 16th May 2006 and was No. 1 off the production line that day.

No: 2 –S/N JGJAAB 100001 Supplied 25th May 2007 with a new Sprint 7: the code suggests the battery was manufactured 12th January 2007 and was No.1 off the production line that day.

No: 3 – S/N JGJAAAB 100030 Supplied 14th June 2007 with a new Sprint 7: the code suggests the battery was manufactured 12th January 2007 and was No.30 off the production line that day.

No: 4 – S/N JGJEAB 100108 Supplied 7th August 2007 (as a spare battery): the code suggests the battery was manufactured 12th May 2007 and was No. 108 off the production line that day.

The batteries are shared between the 2 Sprints that we run and have run about :
No.1 …………………………………..916 miles (< 500 miles on a Torq)
No.2………………………………… 516miles
No.3………………………………….. 516miles
No.4………………………………….. 268 miles

The range of these batts. (Nos. 1,2 & 3) is seriously depleted.
No 1 achieved virtually 30 miles per charge when new, after it had been conditioned. That has now reduced to 16miles and the Red Light comes on on hills of about 6%/500 mtrs after being fully charged and in use for 6 miles. It now cuts out when stressed at this level.

Nos. 2 & 3 would run for 20 miles when first used (first used by me that is – the discrepancy between the date manufactured and used by myself suggests someone other than me had used the batteries before I acquired them, possibly at the Presteigne Event in 2007).
They now run for 10 or 11 miles and both cut out when stressed on a 6% hill/500 mtrs

No. 4 will possibly cover 28 miles on a full charge.

I was unable to “take advantage” of Mr. Ching’s kind offer in December 2007 to replace any battery that had not given appropriate performance because the exchange had to be effected by 50Cyles.

However there is another option that I would wish to consider.
1) Would it be possible to get more ‘power’ from these batteries, especially on hills of 6% or 7% if two were connected in PARALLEL and carried in a pannier and suitably connected to the controller? I have noticed the comparative ‘amazing’ performance of a fully charged new or not so new battery when freshly connected at the foot of a serious gradient (say not > 8%).
2) What would be the effect on motor performance/life if they were connected in SERIES and how would one do that?

Peter
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