Scientists at the University of Wisconsin-Madison have developed a new type of lithium battery could last up to 12 years.
The battery uses current lithium battery technology found in laptops and portable devices, but contains an 'organosilicon electrolyte'.
The researchers will use the batteries in medical implants, such as pacemakers and muscle stimulators used to help Parkinson's patients.
"It turns out that the organosilicon compounds are really good at improving lithium battery technology," said Robert West, Emeritus Professor of Chemistry at Wisconsin-Madison.
"The compounds are very flexible, they don't solidify, they're stable, non-flammable, non-toxic and they pose no threat to the environment."
In order to boost the efficiency still further Professor West's team had to develop 'designer silicons' that would pass the electrical charge more efficiently.
The team has used the technology in a 'micro-stimulator', a device not much larger than a pencil lead that can be injected near target nerves to help overcome the faulty nervous system wiring at the heart of Parkinson's, epilepsy and incontinence.
Current medical batteries last about six years and the team believes that the new technology can double that. Battery replacement is a big problem for patients, since it often requires invasive surgery.
Everything we think we know about the imminent Apple iPhone 9, iPhone 11 and iPhone 11 Plus launches
All the latest rumours about Apple iPhone Displays, CPUs, launch dates and even prices
Nvidia brings Turing microarchitecture into the high-end gaming segment
Did you make the shortlist for the UK's most respected IT event?
Latest Tesla news: Tesla share price continues to fall after Saudi Arabia's sovereign wealth fund is linked to investment in rival
SEC 'probe' takes its toll on Tesla as new research suggests that Tesla loses $6,000 on every $35,000 Model 3