NOVELTY - The battery (200) has positive electrode (210) consisting of current collector (212) and active material (214) including lithium cobalt oxide (LiCoO2) and lithium manganese oxide (LiMn2O4), negative electrode (220) consisting of current collector (222), active material (226) consisting of lithium titanate (Li4Ti5O12) and active material (228) consisting of sulfide. The material (228) exhibits charging and discharging capacity below a corrosion potential of current collector of negative electrode and above decomposition potential of active material of positive electrode.    USE - Lithium ion battery for use in e.g. medical devices such as defibrillator and a neurological stimulation device. Can also be used in other implantable medical devices such as pacemakers, cardioverters, cardiac contractility modulators, drug administering devices, diagnostic recorders and cochlear implants, non-implantable medical devices and other devices such as computers e.g. laptop computers, phones e.g. cellular, mobile and cordless phones and motor vehicle.    ADVANTAGE - The lithium-ion batteries are relatively tolerant to over-discharge conditions, rechargeable and discharged to near zero voltage condition without the risk of damage of the battery. The battery is discharged to near zero volts without producing a decrease in the amount of deliverable capacity or producing a corroded negative electrode or battery case. The battery compensates for the irreversible loss of capacity resulting from initial charging of the battery to allow the battery to be used in near zero voltage conditions without degradation of battery performance. The lithium titanate material allows for charging and discharging of the battery at high rates and offers superior cycle life by not experiencing shrinkage or contraction with lithium doping/de-doping and being free from strain-related degradation mechanisms. The battery using lithium titanate is less likely to result in the plating of lithium. Being able to recharge battery more quickly increases the functionality of devices employing such a battery. The lithium titanate material avoids decomposition of organic solvents such as propylene carbonate commonly used in lithium ion batteries for reducing negative consequences such as formation of gas, cell swelling, and reduction of reversible battery capacity. The secondary active material is partially or completely lithiated by the lithium to compensate for the irreversible loss of capacity occurring upon the charging of the battery. The lithium patch is provided so as to compensate for the irreversible loss of capacity. The need to utilize circuitry to disconnect batteries approaching near-zero voltage conditions is eliminated for achieving volume and cost reduction.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional view of a portion of lithium-ion battery.    Lithium ion battery (200)    Positive electrode (210)    Current collectors (212,222)    Active materials (214,224,226,228)    Negative electrode (220)