Relegating, not retiring, Spring of 2004 Lipo builds to lighter duty applications.
2 - 25.9V 25.92Ah (7s12p 2160mAh cells) = 671wh
Both packs were built from recycled Dell CD bay auxiliary batteries
of very good condition. Actual metered charges, from modest discharge depths were 90% + of new rating.
Each has cycled hundreds of times for resultant thousands of miles on eZips geared up for 21-22mph from motor only.
Initial 13T motor sprocket upgraded eZip of near 25mph capability was too stressful for these packs, so I "relented" and moderated back to the 11T.
This still exceeds my recommended .5C discharge rate for these cells and actual capacity has degraded ~20Ah ... which nears a 1C discharge rate when cruising at ~21mph.
Rather than running till dead at this high, for laptop cells, discharge rate I am relegating packs to my oem geared eZips. ~16mph motor only speeds
25mph requires 600w motor output (~750w battery input) - 28A
22mph requires 425w motor output (~530w battery input) - 20A
21mph requires 380w motor output (~475w battery input) - 18.4A
20mph requires 340w motor output (~425w battery input) - 16.3A
19mph requires 300w motor output (~375w battery input) - 14.4A
18mph requires 260w motor output (~325w battery input) - 12.5A
17mph requires 220w motor output (~275w battery input) - 10.6A
16mph requires 190w motor output (~237w battery input) - 9.1A
I anticipate many years of satisfactory service, as opposed to the comparatively rapid degradation at present demands.
(All in eZip RMB battery cases)
7s12p (25.9V 25.92Ah) = 671wh
of NOS Sony laptop Lipo cells
As everyday battery compatible with all my eBikes except the Snow Beast.
And to evaluate the Sony cells, of which I have several hundred.
9s8p 2160mAh (33.3V 17.28Ah) laptop Lipo
9s1p 2000mAh (33.3V 2Ah) RC Lipo
for a total
33.3V 19.28Ah = 642wh
of mixed hybrid cells
For PA (Pedal Assist) use on several of my multi voltage capable eBikes and light duty on 36V controllered Snow Beast.
And to test evaluate RC + Laptop Lipo
9s12p 2600mAh (33.3V 31.2Ah) 1038.96wh
Mix of NOS Sony and Sanyo cells
Dedicated for Snow Beast Winter use and performance "runs" on several multi voltage capable eBikes.
I also have a fair quantity of NOS 3s 5700mAh Winforce RC
Not sure if I will build a :
9s3p (33.3V 17.1Ah) pack = 567.43wh
As HD high speed or Snow Beast pack
3s9p (11.1V 51.3Ah) pack = 567.43wh
As serial pack to Turbo switch 25.9V >>> 37V (eZips hold 2 packs with switch that can be jumpered to provide Turbo)
As auxiliary pack for 12V Lighting, power tools, inverter etc.