The following solution below will ONLY increase battery life
All you need to do is install Titanium Backup and freeze as many of the following apps as you don’t need.

I have frozen them all and the device is working very smoothly.

…………………..

Application monitor 1.1.0 (com.sec.android.widgetapp.programmonito rwidget)
Automation Test 1.0 (com.sec.android.app.DataCreate)
BluetoothTest 1.0 (com.sec.android.app.bluetoothtest)
ChatON 1.11.2 (com.sec.chaton)
ChocoEUKor 1.0 (com.monotype.android.font.chococooky)
Clock (digital) 1.0 (com.sec.android.widgetapp.digitalclock)
Clock (funky) 1.0 (com.sec.android.widgetapp.analogclockun ique)
Clock (modern) 1.0 (com.sec.android.widgetapp.analogclocksi mple)
com.sec.android.app.lcdtest 1.0 (com.sec.android.app.lcdtest)
CoolEUKor 1.0 (com.monotype.android.font.cooljazz)
Days 1.0 (com.sec.android.widgetapp.days)
DSMForwarding 4.1.2-I9100XXLSJ (com.sec.dsm.phone)
DSMLawmo 4.1.2-I9100XXLSJ (com.sec.dsm.system)
Dual Clock (analogue) 1.0 (com.sec.android.widgetapp.dualclockanal og)
Dual Clock (digital) 1.0 (com.sec.android.widgetapp.dualclockdigi tal)
Email 4.0 (com.android.email)
Enterprise SysScope Service 4.1.2-I9100XXLSJ (com.android.server.device.enterprise)
Enterprise VPN Services 4.1.2-I9100XXLSJ (com.android.server.vpn.enterprise)
EnterprisePermissions 1.0 (com.sec.enterprise.permissions)
Exchange services 4.1 (com.android.exchange)
Face Unlock 4.1.2-509230 (com.android.facelock)
Factory Test 1.0 (com.sec.android.app.factorytest)
Favorite Apps 1.0 (com.sec.android.favoriteappwidget)
Favorite Contacts 1.1 (com.sec.android.widgetapp.favoriteswidg et)
Game Hub 2.0 (com.ngmoco.gamehubmobage)
Group Cast 1.5.40 (com.samsung.groupcast)
Help 1.0 (com.samsung.helphub)
Kies via Wi-Fi 2.0.0 (com.sec.android.app.kieswifi)
Kobo 2.7.940 (com.kobobooks.samsung.android)
MAPServiceSamsung 4.1.2-I9100XXLSJ (com.samsung.map)
Memo 1.0 (com.sec.android.app.memo)
Memo 1.0 (com.sec.android.widgetapp.memo)
Microbes 4.1.2-I9100XXLSJ (com.samsung.android.livewallpaper.micro besgl)
Mini Diary 1.0.5.20121102 (com.sec.android.app.minidiary)
Mobile print 1.6.1.0803 (com.sec.android.app.mobileprint)
Mobile tracker 1.0 (com.android.settings.mt)
My Files 1.0.0 (com.sec.android.app.myfiles)
News Daemon(EUR) 121023.01 (com.sec.android.daemonapp.ap.yahoonews)
Ocean weather 1.0 (com.sec.ccl.csp.app.secretwallpaper.the meone)
PressReader 4.1.1102 (com.newspaperdirect.pressreader.android .samsung)
Readers Hub 12.09.13.1 (com.sec.android.app.readershub)
RoseEUKor 1.0 (com.monotype.android.font.rosemary)
S Planner 4.1.2-I9100XXLSJ (com.android.calendar)
S Planner widget 1.0 (com.sec.android.widgetapp.SPlannerAppWi dget)
Samsung Apps 2.8.036 (com.sec.android.app.samsungapps)
Samsung Backup Provider 1.2 (com.sec.android.sCloudBackupProvider)
Samsung Browser SyncAdapter 1.0 (com.sec.android.sCloudSyncBrowser)
Samsung Calendar SyncAdapter 1.0 (com.sec.android.sCloudSyncCalendar)
Samsung Cloud Data Relay 1.4.12r1 (com.sec.android.sCloudRelayData)
Samsung Contact SyncAdapter 1.0 (com.sec.android.sCloudSyncContacts)
Samsung keyboard 1.0 (com.sec.android.inputmethod)
Samsung Push Service 1.1.2 (com.sec.spp.push)
Samsung Syncadapters 2.2.5 (com.sec.android.sCloudSync)
Samsung TTS (com.samsung.SMT)
SamsungAppsUNA2 2.0.35 (com.sec.android.app.samsungapps.una2)
SASlideShow 1.0 (com.sec.android.saslideshow)
Self Test Mode 1.0 (com.sec.android.app.selftestmode)
Simple alarm clock 1.0 (com.sec.android.widgetapp.alarmclock)
SNS 1.1.0 (com.sec.android.app.sns3)
Software update v2.2.9 (com.sec.android.fotaclient)
Software update v5_1210_5_2 (com.wssyncmldm)
Stock Daemon(EUR) 121105.01 (com.sec.android.daemonapp.ap.yahoostock .stockcloc k)
Swype 1.3.3.9783 (com.nuance.swype.input)
SysScope 1.1.15 (com.sec.android.app.sysscope)
T-Mobile 4.1.2-I9100XXLSJ (com.android.stk)
Talk 4.1.2-509230 (com.google.android.talk)
TalkBack 3.1.1_r68 (com.google.android.marvin.talkback)
TouchWiz home 4.1.2-I9100XXLSJ (com.sec.android.app.launcher)
Trim 34.6.ms_hw (com.lifevibes.trimapp)
Try panning 1.0 (com.sec.android.motions.settings.panni