# Best Batteries *By [Subhransu Sahu](https://research.g2.com/insights/author/subhransu-sahu)* Batteries are devices that consist of one or more cells, used to convert stored chemical energy into useful electrical energy. Thanks to new technologies and cost productivity, new battery applications are emerging in many areas, such as electric vehicles and microgrids. Several chemistries are in use, including lithium-ion (li-ion), VRB (Vanadium Redox Battery or Flow Battery), zinc-based, lead acid, and sodium-sulphur (NaS). Battery performance varies typically in terms of power, capacity, lifetime (cycling tolerance, round trip efficiency, power density, and depth of discharge. In order to qualify for inclusion in the battery category, a product must: - Store energy - Provide power to electrical devices ## Category Overview **Total Products under this Category:** 18 ## Trust & Credibility Stats **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 0+ Authentic Reviews - 18+ Products - Unbiased Rankings G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category. ## Top-Rated Products (Ranked by G2 Score) ### 1. [BrightBox](https://www.g2.com/products/sunrun-brightbox/reviews) Brightbox generates, stores, and manage cleans affordable solar energy on your terms. **Average Rating:** 4.8/5.0 **Total Reviews:** 3 **Seller Details:** - **Seller:** [SunRun](https://www.g2.com/sellers/sunrun) - **Year Founded:** 2007 - **HQ Location:** San Francisco, California, United States - **Twitter:** @Sunrun (49,874 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/sunrun/ (10,340 employees on LinkedIn®) - **Ownership:** NASDAQ: RUN **Reviewer Demographics:** - **Company Size:** 67% Small-Business ### 2. [Li-ion / Polymer Cell](https://www.g2.com/products/li-ion-polymer-cell/reviews) Due to the patented cell design, the energy density of the High Energy type SLPB's is extremely high, while the high power type SLPB's. The superior characteristics of Kokam's Lithium polymer battery are built using Kokam's distinct manufacturing technology. **Average Rating:** 5.0/5.0 **Total Reviews:** 1 **Seller Details:** - **Seller:** [Kokam](https://www.g2.com/sellers/kokam) - **HQ Location:** Suwon-si, South Korea - **Twitter:** @KokamCoLtd (100 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 100% Enterprise ### 3. [Powervault](https://www.g2.com/products/powervault/reviews) Powervault stores electricity in your home using either Lithium-ion Phosphate cells or Lead Acid batteries. Powervault's Lithium-ion Phosphate cells can store 2kWh-6kWh of usable (AC) energy. **Average Rating:** 4.5/5.0 **Total Reviews:** 1 **Seller Details:** - **Seller:** [Powervault](https://www.g2.com/sellers/powervault) - **Year Founded:** 2012 - **HQ Location:** London, GB - **Twitter:** @power_vault (2,012 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/4973922/ (37 employees on LinkedIn®) **Reviewer Demographics:** - **Company Size:** 100% Small-Business ### 4. [ALM Lithium Ion Batteries](https://www.g2.com/products/alm-lithium-ion-batteries/reviews) ALM Lithium Ion Batteries has high rate power delivery with consistent energy capacity. **Seller Details:** - **Seller:** [NEC Energy Solutions](https://www.g2.com/sellers/nec-energy-solutions) - **HQ Location:** Westborough, Massachusetts, United States - **LinkedIn® Page:** https://www.linkedin.com/company/5320268 (33 employees on LinkedIn®) ### 5. [Battery Guru](https://www.g2.com/products/battery-guru/reviews) Battery Guru is the ultimate app for displaying battery info of your phone and tablet! With a wide range of features, we offer everything users need. Want to know your screen-on time? Or an estimate of power used while the screen was off? We save you time, everything is one click away. Set battery alarm, check battery temperature while charging, when fully charged, monitor battery health, all about battery life in a simple way. With Battery Guru, you have everything in the palm of your hand. **Seller Details:** - **Seller:** [Paget96](https://www.g2.com/sellers/paget96) - **HQ Location:** N/A - **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®) ### 6. [Battery Modules](https://www.g2.com/products/battery-modules/reviews) ESS solutions have been utilized to support grid frequency, improve power quality and reliability of renewable energy sources, manage peak loads, frequency fluctuations, support voltage sags, sustain micro grids, and prevent massive black-outs and more. **Seller Details:** - **Seller:** [Kokam](https://www.g2.com/sellers/kokam) - **HQ Location:** Suwon-si, South Korea - **Twitter:** @KokamCoLtd (100 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®) ### 7. [Diesel Electric Bikes](https://www.g2.com/products/diesel-electric-bikes/reviews) Diesel Electric Bikes is a California‑based electric bicycle company that designs and builds high‑powered, performance‑oriented e‑bikes for experienced riders. The brand launched its first two models, the RS‑1 and RX‑1, in March 2026 and sells directly to consumers through dieselelectricbikes.com across the continental United States. **Seller Details:** - **Seller:** [Diesel Electric Bikes](https://www.g2.com/sellers/diesel-electric-bikes) - **HQ Location:** N/A - **LinkedIn® Page:** https://www.linkedin.com/company/diesel-electric-bikes/ (1 employees on LinkedIn®) ### 8. [Electrovaya Battery Modules](https://www.g2.com/products/electrovaya-battery-modules/reviews) Electrovaya is focused on contributing to the prevention of climate change through supplying the safest and longest lasting Li-Ion batteries in the marketplace. **Seller Details:** - **Seller:** [Electrovaya](https://www.g2.com/sellers/electrovaya) - **Year Founded:** 1997 - **HQ Location:** Mississauga, CA - **Twitter:** @Electrovaya (1,769 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/electrovaya (84 employees on LinkedIn®) - **Ownership:** TSX:EFL ### 9. [ESS Battery](https://www.g2.com/products/ess-battery/reviews) Energy Storage System(ESS) stores electric energy and utilize them for later consumption. It is purposed to improve energy efficiency, by enhancing the quality of renewable energy that results stabilization of power supply system. **Seller Details:** - **Seller:** [LG Chem](https://www.g2.com/sellers/lg-chem) - **Year Founded:** 1947 - **HQ Location:** Seoul Seoul ,South Korea - **LinkedIn® Page:** https://www.linkedin.com/company/lgchem (5,638 employees on LinkedIn®) - **Ownership:** KRX: 051910 ### 10. [Evolution Lithium](https://www.g2.com/products/evolution-lithium/reviews) Evolution lithium. Car audio scib battery banks in new zealand **Seller Details:** - **Seller:** [Evolution Lithium](https://www.g2.com/sellers/evolution-lithium) - **HQ Location:** N/A - **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®) ### 11. [Fluidic Zinc-Air Technology](https://www.g2.com/products/fluidic-zinc-air-technology/reviews) Zinc-Air based energy storage platform has substantial raw material cost advantages over lead acid batteries (1/4th the cost) and lithium ion batteries (1/17th the cost). **Seller Details:** - **Seller:** [Fluidic Energy](https://www.g2.com/sellers/fluidic-energy) - **Year Founded:** 2006 - **HQ Location:** Scottsdale, US - **LinkedIn® Page:** http://www.linkedin.com/company/fluidic-energy (57 employees on LinkedIn®) ### 12. [HR Energy Storage Racks](https://www.g2.com/products/hr-energy-storage-racks/reviews) The High Rate (HR) Energy Storage Racks are fully integrated battery storage system offering reliable energy storage for a wide range of high rate, high power applications. **Seller Details:** - **Seller:** [NEC Energy Solutions](https://www.g2.com/sellers/nec-energy-solutions) - **HQ Location:** Westborough, Massachusetts, United States - **LinkedIn® Page:** https://www.linkedin.com/company/5320268 (33 employees on LinkedIn®) ### 13. [LD Energy Storage Racks](https://www.g2.com/products/ld-energy-storage-racks/reviews) The LD Energy Storage Racks are high performance, fully integrated battery systems for a wide range of long duration energy storage applications. **Seller Details:** - **Seller:** [NEC Energy Solutions](https://www.g2.com/sellers/nec-energy-solutions) - **HQ Location:** Westborough, Massachusetts, United States - **LinkedIn® Page:** https://www.linkedin.com/company/5320268 (33 employees on LinkedIn®) ### 14. [MPINarada Narada HRXL Series Data Center Battery](https://www.g2.com/products/mpinarada-narada-hrxl-series-data-center-battery/reviews) Narada has been in the battery business for over 25 years and has a history of industry knowledge that is unsurpassed in the battery market. With a foundation of expertise to build upon, creating new solutions comes naturally. Experience also comes into play when realizing new ideas can also come from building upon existing ones. The Narada HRL and HTB series batteries each have unique strengths for data centers and reserve power telecom applications. It only makes sense that their strongest features was recognized as a foundation for creating the new HRXL product series, which is already having a huge impact in the critical power area of the market. This current technical paper, “Narada HRXL Series Data Center Battery: An Inside Look at What Makes This VRLA Battery the Most Reliable, Cost-Effective Design Available Today“, takes a deep dive into the technology behind the latest battery innovations to hit the market. Having the right mix of ingredients for a product application can make all the difference in achieving the end goals of performance, time and money savings, and more. Learn all about the benefits a total system solution can offer before you consider your next purchase decision. **Seller Details:** - **Seller:** [MPINarada](https://www.g2.com/sellers/mpinarada) - **Year Founded:** 1995 - **HQ Location:** Newton, US - **LinkedIn® Page:** https://www.linkedin.com/company/mpinarada (31 employees on LinkedIn®) ### 15. [Phi Product Line](https://www.g2.com/products/phi-product-line/reviews) The PHI product line deep-cycle Lithium Ferro Phosphate (LFP) battery is optimized with proprietary cell architecture, power electronics, BMS and assembly methods. It is modular, lightweight and scalable. Provides power security and seamless integration of renewable and traditional sources of energy in conjunction with or independent of the grid: net zero, peak shaving, emergency back-up, portable and mobile. **Seller Details:** - **Seller:** [SimpliPhi](https://www.g2.com/sellers/simpliphi) - **Year Founded:** 2010 - **HQ Location:** Oxnard, US - **LinkedIn® Page:** https://www.linkedin.com/company/briggsandstrattonenergy/ (44 employees on LinkedIn®) ### 16. [Power Depo](https://www.g2.com/products/power-depo/reviews) Equipped with a 2.9-kWh lithium-ion battery, the POWER DEPO II is a stand-alone storage battery capable of powering information systems and household appliances over a long period of time during a power failure in disasters. The system is able to continue providing a stable power supply from its link with the photovoltaic generator. **Seller Details:** - **Seller:** [Sumitomo Energy](https://www.g2.com/sellers/sumitomo-energy) - **HQ Location:** Osaka, JP - **Twitter:** @SEL_FiberOptics (776 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/sumitomo-electric (10,526 employees on LinkedIn®) ### 17. [Redox Flow](https://www.g2.com/products/redox-flow/reviews) Redox flow batteries are rechargeable batteries that are charged and discharged by means of the oxidation-reduction reaction of ions of vanadium or the like. **Seller Details:** - **Seller:** [Sumitomo Energy](https://www.g2.com/sellers/sumitomo-energy) - **HQ Location:** Osaka, JP - **Twitter:** @SEL_FiberOptics (776 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/sumitomo-electric (10,526 employees on LinkedIn®) ### 18. [Sunverge One](https://www.g2.com/products/sunverge-one/reviews) The Sunverge One is a fully integrated, field-tested energy storage system that includes best-in-class batteries, power electronics and the Sunverge energy management software. **Seller Details:** - **Seller:** [Sunverge](https://www.g2.com/sellers/sunverge) - **Year Founded:** 2009 - **HQ Location:** San Francisco, US - **Twitter:** @Sunverge (3,256 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/1491616 (13 employees on LinkedIn®) ## Parent Category [Greentech Providers](https://www.g2.com/categories/greentech)