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==How to use it==
The following ruby script can generates the following output

./battery.rb
 [+] 01:02 (90%)

./battery.rb -v
 The battery is charging
 Current Status		90%
 Remaining Charging Time	01h02m
 Charging Till		22:52
 
 After 91 cycles the battery has 90% of its design capacity

./battery.rb -b
 [######### ]

./battery.rb -h
 This is a very small script for getting some usefull information about your battery
 Please notice that this script requires tp_smapi which is only available on ThinkPads
 
 Version 0.1 written by futejia during the 24C3 in Berlin
 The script is published under the 'Beer License' which means you can do whatever you want, and when you like the script you buy me a beer
 
 Command line options:
     All information you usually need in one single line
 -h  Prints this help
 -b  Prints a nice ascii battery (Single line)
 -v  Gives some more information about the battery


==The script itself==
Simple safe this as battery.rb (Of course you need ruby and tp_smapi installed)
 
 #!/usr/bin/ruby 
 def getFileValue(filename)
   file = File.new(filename,"r")
   content = file.gets
   file.close
   content = content.delete "\n"
 end
 
 def addLeadingZero(value)
   if value < 10
     output = "0" + value.to_s
   else
     output = value.to_s
   end
 end
 
 begin
   state = getFileValue("/sys/devices/platform/smapi/BAT0/state")
   if state == "charging" 
     remaning_time = getFileValue("/sys/devices/platform/smapi/BAT0/remaining_charging_time").to_i
     symbol = "[+]"
     descriptingword = "Charging"
   elsif state == "discharging"
     remaning_time = getFileValue("/sys/devices/platform/smapi/BAT0/remaining_running_time").to_i
     symbol = "[-]"
     descriptingword = "Running"
   elsif state == "idle"
     remaning_time = 0
     symbol = "[ ]"
     descriptingword = "Idle"
   else
     puts "Unknown value: '"+state+"'"
   end
   percent = getFileValue("/sys/devices/platform/smapi/BAT0/remaining_percent").to_i
   batterybar = (percent.to_f / 10).round
   hours = remaning_time / 60
   minutes = remaning_time % 60
 
   if ARGV[0] == "-v"
    
     puts "The battery is " + state
     #getting some information about the current capacity
     design_capacity = getFileValue("/sys/devices/platform/smapi/BAT0/design_capacity").to_i
     last_full_capacity = getFileValue("/sys/devices/platform/smapi/BAT0/last_full_capacity").to_i
     capacity = last_full_capacity * 100 / design_capacity
 
     cycles = getFileValue("/sys/devices/platform/smapi/BAT0/cycle_count")
 
     d = Time::now()
     d += remaning_time * 60
     puts "Current Status\t\t" + percent.to_s + "%"
     puts "Remaining " + descriptingword + " Time\t" +   addLeadingZero(hours) + "h" + addLeadingZero(minutes) + "m"
     if state != "idle"
       puts descriptingword + " Till\t\t" + addLeadingZero(d.hour()) + ":" + addLeadingZero(d.min())
     end
     puts ""
     puts "After " + cycles.to_s + " cycles the battery has " + capacity.to_s + "% of its design capacity"
   elsif ARGV[0] == "-b"
     battery = ""
     batterybar.downto(1) { battery += "#" }
     batterybar.upto(9) { battery += " " }
     puts "[" + battery + "]"
   elsif ARGV[0] == "-h"
     puts "This is a very small script for getting some usefull information about your battery"
     puts "Please notice that this script requires tp_smapi which is only available on ThinkPads"
     puts
     puts "Version 0.1 written by futejia during the 24C3 in Berlin"
     puts "The script is published under the 'Beer License' which means you can do whatever you want, and when you like the script you buy me a beer"
     puts 
     puts "Command line options:"
     puts "    All information you usually need in one single line"
     puts "-h  Prints this help"
     puts "-b  Prints a nice ascii battery (Single line)"
     puts "-v  Gives some more information about the battery"
   else
     puts symbol + " " + addLeadingZero(hours) + ":" + addLeadingZero(minutes) + " (" + percent.to_s + "%)"
   end
 end