Olympus BLM-1 Battery Guide: Specs, BLM-5 Upgrade & Third-Party Options

The Olympus BLM-1 is a legacy lithium-ion battery (7.2V, 1500mAh) primarily used in early Olympus E-system DSLRs (E-1, E-3, E-300, etc.) and Camedia models Apotelyt Batteriesamerica. As a 20-year-old battery format, its market is now defined by the transition to the BLM-5 successor and a robust third-party ecosystem.

Product Specifications & Compatibility

* Key Specs: Standard 7.2V DC output with a typical OEM capacity of 1500mAh Apotelyt Batterymart.

* Upgradability: The BLM-5 is fully backward-compatible and offers a higher OEM capacity (1620mAh). It is the recommended native battery for the Olympus E-5 but fits all BLM-1 cameras Apotelyt Walmart.

* Compatibility: Supports professional Four Thirds DSLRs (E-1, E-3, E-5) and enthusiast models (E-30, E-300 to E-520 series) Walmart Batterymart.

Market Trends & Insights (2026 Perspective)

* Supply Shift: Genuine Olympus BLM-1 batteries are increasingly rare, with retail prices often reaching $60 Apotelyt. The market has largely shifted to third-party replacements from brands like Wasabi Power and Kastar, which retail between $15–$26 for multi-packs Wasabipower Walmart.

* Performance Gap: While third-party cells often claim 1800mAh–2000mAh, user data suggests they typically deliver 70–80% of the actual runtime found in original OEM batteries Dpreview Dpreview.

* Interest Trend: Search interest in legacy camera batteries has shown steady growth through 2026, peaking in late 2026 as vintage digital photography (the "CCD sensor" trend) continues to gain momentum among enthusiasts .

Sourcing Summary

Wholesale prices for BLM-1 and BLM-5 replacements range from $3.00 to $5.50 per unit for bulk orders (MOQ 3–10 pieces), primarily supplied by manufacturers in Shenzhen and Dongguan Alibaba Alibaba.