OSI Batteries is an authorized factory-direct distributor with custom production capabilities, delivering professional battery solutions worldwide.
INDUSTRY LEADER
OSI Batteries has been a leader in the battery business as a full-line replacement battery company for over 50 years. We are an authorized factory-direct distributor and value-add center of specialty batteries, chargers, and related products from top manufacturers in the industry. OSI delivers professional battery solutions to businesses, medical organizations, and government agencies who rely on battery power to get their jobs done.
MANUFACTURING
We operate our own in-house battery assembly division capable of custom production orders of any size. OSI is now the master distributor for all Unipower batteries, products, and accessories, and also develops and sells its own brand of quality aftermarket replacement batteries for two-way radios, medical devices, UPS systems, emergency lighting, PLCs, barcode scanners, utility meters, and much more.
SERVICE
Our customer service team has years of experience finding the right battery solution. Servicing an extensive customer base from military and public safety departments, to schools, hospitals and everyday people, OSI is ready to help with your next battery purchases. Whether it is an OEM replacement battery, an aftermarket battery, or a custom battery, our team delivers personalized, one-on-one customer service and battery advice. We stand behind every order, and ordering is easy and convenient by phone, email, or our website.
KNOWLEDGEABLE
Our experienced staff provides our customers with extensive knowledge in all aspects of the battery business. From battery assembly knowledge to battery market experience, working with OSI ensures you receive a comprehensive battery buying experience you can depend on.
RELIABLE
OSI prides itself in providing a reliable, stress-free battery buying experience, and ensures we carry only the highest quality products, while providing fast and accurate delivery.
OSI is your One Source in Batteries. We can help power your day, because we know batteries.
17,065 Verified Customer Reviews
17,065 Customer Ratings and Reviews
Shopper Approved collects trusted reviews from customers who have made a verified purchase.
4.7
Overall Star
Rating
5-star reviews
About this Company
OSI Batteries is an authorized factory-direct distributor with custom production capabilities, delivering professional battery solutions worldwide.
INDUSTRY LEADER
OSI Batteries has been a leader in the battery business as a full-line replacement battery company for over 50 years. We are an authorized factory-direct distributor and value-add center of specialty batteries, chargers, and related products from top manufacturers in the industry. OSI delivers professional battery solutions to businesses, medical organizations, and government agencies who rely on battery power to get their jobs done.
MANUFACTURING
We operate our own in-house battery assembly division capable of custom production orders of any size. OSI is now the master distributor for all Unipower batteries, products, and accessories, and also develops and sells its own brand of quality aftermarket replacement batteries for two-way radios, medical devices, UPS systems, emergency lighting, PLCs, barcode scanners, utility meters, and much more.
SERVICE
Our customer service team has years of experience finding the right battery solution. Servicing an extensive customer base from military and public safety departments, to schools, hospitals and everyday people, OSI is ready to help with your next battery purchases. Whether it is an OEM replacement battery, an aftermarket battery, or a custom battery, our team delivers personalized, one-on-one customer service and battery advice. We stand behind every order, and ordering is easy and convenient by phone, email, or our website.
KNOWLEDGEABLE
Our experienced staff provides our customers with extensive knowledge in all aspects of the battery business. From battery assembly knowledge to battery market experience, working with OSI ensures you receive a comprehensive battery buying experience you can depend on.
RELIABLE
OSI prides itself in providing a reliable, stress-free battery buying experience, and ensures we carry only the highest quality products, while providing fast and accurate delivery.
OSI is your One Source in Batteries. We can help power your day, because we know batteries.
7 hours ago , MI
easy to find the battery that I needed.
Merchant Choice
exact match to the battery in the chairlift

7 hours ago
Matched the manufacture original product.
Today , IL
So gar so good hope this is 5he correct one Northern Tool sent the wrong one
1 day ago , TN
so far so good
Product choice
it seems most compatible
Merchant Choice
replacing my battery
1 day ago , MT
seems easy enough!
Product choice
It fits
Merchant Choice
Unique battery I have not been able to find for a few years. Friend recommended OSI
1 day ago , KY
Simple easy to use website
Product choice
.
Merchant Choice
Had the battery I needed
2 days ago , MD
These arrived with at least a partial charge. I couldn't determine if they had a partial or full charge though, so I charged them for eight hours.
Product choice
Torches needed batteries.
Merchant Choice
Lowest price

2 days ago
They arrived with at least a partial charge. I have now way of telling if it is a partial or full charge , so I stuck them in the flashlights and charged them for eight hours.
2 days ago , MD
So easy to find my exact products!
Product choice
I am purchasing two used LifeFitness cardio machines and picking them up this weekend. The current owner said he used to order his batteries on amazon. I prefer using 'other than amazon' when possible.
Merchant Choice
Google searched and your site was simple and to the point. The first review I saw was "they're the only place I can find this battery".
2 days ago , LA
Fast and Easy!!
Product choice
I wanted the same replacement battery
Merchant Choice
Great price!!
3 days ago , TN
good
Merchant Choice
Had the symbol battery I was looking for
Product choice
it was the same as the device currently has

3 days ago
Batteries were just as we expected and they work great
5 days ago , MO
website is slow and hard to use
Product choice
only place that had replacement lawnmower batter
Merchant Choice
only place that had this battery in stock
1 week ago , AR
Quick and easy. Answered questions I had promptly.
Product choice
Correct battery for scooter.
Merchant Choice
Pricing and availability
1 week ago , CA
Very clear and easy ordering process.
Merchant Choice
You had what I needed at a good price.
Product choice
Because I have 2 ceiling lifts.
1 week ago , OH
Easy to use. Found what I wanted.
Product choice
Customer needs
Merchant Choice
Best price
1 week ago , KY
Great customer service
1 week ago , FL
Very easy
Merchant Choice
Availability of what we need
1 week ago , CT
good
1 week ago , OH
thank you
Product choice
the last set of batteries worked
Merchant Choice
used before
1 week ago , CA
Great
Product choice
Only one for my elliptical
Merchant Choice
Cheaper than manufacturer
1 week ago , MI
very prompt
Merchant Choice
it's what the manufacturer had used originally.
2 weeks ago , AL
It was user friendly. It was easy.
Product choice
Good quality
Merchant Choice
Past order
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