# eMPG
**URL:** https://community.electricforum.com/t/empg/3766
**Category:** Battery & Chargers
**Created:** [September 24, 2013, 6:11am UTC](https://community.electricforum.com/t/empg/3766 "2013-09-24T06:11:09Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Dr\_Kangel](https://community.electricforum.com/u/Dr_Kangel)
#### Post date: [September 24, 2013, 6:11am UTC](https://community.electricforum.com/t/empg/3766/1 "2013-09-24T06:11:09Z")
eMPG = electric (equivalent) Miles Per Gallon
Based on electricity at $.11/kWh and gasoline at $4/gallon, my modified eZip gets between 1500 and 2500 eMPG!
Dependent on speed and terrain, of course.
20mph commuting vs 16 mph “cruise” mode.
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### Author:  [@Dr\_Kangel](https://community.electricforum.com/u/Dr_Kangel)
#### Post date: [September 24, 2013, 6:32am UTC](https://community.electricforum.com/t/empg/3766/2 "2013-09-24T06:32:57Z")
[quote=Dr Kangel;17104]eMPG = electric (equivalent) Miles Per Gallon
Based on electricity at $.11/kWh and gasoline at $4/gallon, my modified eZip gets between 1500 and 2500 eMPG!
Dependent on speed and terrain, of course.
20mph commuting vs 16 mph “cruise” mode.[/quote]
Fortunately, I live within 50 miles of Niagara Falls - hydroelectric supply.
Possibly, even better, our surrounding hills have been slated for wind power generation.
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### Author:  [@Dr\_Kangel](https://community.electricforum.com/u/Dr_Kangel)
#### Post date: [September 24, 2013, 7:10pm UTC](https://community.electricforum.com/t/empg/3766/3 "2013-09-24T19:10:58Z")
Besides increased range and durability …
I dumped SLA and went Lithium Cobalt for more reasons:
SLA loses energy as waste heat during charging.
10Ah SLA, discharged in 1/2hr, only outputs 5Ah = 50% wasted energy!
Lithium Cobalt battery of the same size has 6x the usable output as SLA.
SLA is heavy, almost 10x the weight per usable Ah.
Oh … and I build my Lithium Ion packs using recycled laptop cells.
Dirt cheap if found in bulk and typically with a decent percentage of very good condition cells.
[](http://endless-sphere.com/forums/viewtopic.php?f=14&t=26383)