ESAB Sentinel A70 Pro Battery and Parts Guide
The ESAB Sentinel A70 Pro is built for industrial welding environments where the demands on a helmet go well beyond casual shop use. It has a rechargeable lithium battery, a USB-C charging port, a flip-up ADF assembly, and an external digital dial for one-hand control. Understanding how its parts system works - and how it differs from the A50 and A60 - is the starting point for keeping it running.
The Battery: Rechargeable Lithium, USB-C Charged
The A70 Pro does not use a replaceable coin-cell battery like the Sentinel A50 or A60. The A70 Pro uses a rechargeable lithium battery pack integrated into the ADF assembly, charged via USB-C. This is a fundamental design difference from the rest of the Sentinel line.
The battery is part of the external digital dial and battery assembly, part number 0700900705. This assembly includes both the battery and the external control dial that sits on the outside of the ADF flip shell.
Charging: Use the included USB-C cable. The A70 Pro ships with a USB-C cable as part of the package. Charge the battery before extended use periods. The A70 Pro is designed for all-day industrial shifts, so battery runtime under normal operating conditions should comfortably cover a full workday.
When the battery assembly needs replacement:
- The ADF no longer powers on even after charging
- Charging via USB-C no longer restores function
- The battery holds less charge over time (degradation after many charge cycles)
If the battery assembly has failed, order the 0700900705 assembly from ESAB or an authorized distributor.
Cover Lenses
Outer Cover Lens - Part 0700900703
The outer cover lens for the A70 Pro is sold in a 5-pack (part 0700900703). This lens faces the weld, absorbs spatter, and is the primary sacrificial protective layer over the ADF. Replace when spatter pitting or scratches reduce visibility.
Outer Cover Lens Retainer - Part 0700900702
This is the retaining frame that holds the outer cover lens in position on the ADF. If the retainer is cracked or damaged, the cover lens will not seat correctly, leaving the ADF exposed. Replace as needed.
Inner Cover Lens - Part 0700900706
The inner protection lens sits between the ADF and your face, protecting from sweat and condensation. Sold in a 5-pack (0700900706). More durable than the outer lens under normal conditions - typically replaced less frequently.
ADF Assembly Parts
ADF Flip Shell - Part 0700900704
The A70 Pro’s defining feature is its flip-up ADF assembly - the entire lens unit flips up for grinding or inspection without removing the helmet. Part 0700900704 is the ADF assembly itself (“ADF - digital dial and battery not included”). This is the mechanical flip-shell without the battery/dial assembly.
If the flip-shell mechanism fails, the hinge cracks, or the ADF cartridge within the shell stops functioning (separate from the battery), this part covers the mechanical assembly.
Digital Dial and Battery Assembly - Part 0700900705
The external digital rotary dial that sits on the front of the ADF flip shell. This dial controls shade, sensitivity, and other settings from outside the helmet without needing to tip the helmet or reach inside. It also contains the rechargeable battery. This is the single most important service part on the A70 Pro.
Full A70 Pro Parts List
The official ESAB parts list from the A70 Pro product page includes:
| Part Number | Description |
|---|---|
| 0700600869 | Sweatband (used with A60/A70 series) |
| 0700900702 | Outer cover lens retainer |
| 0700900703 | Outer cover lens 5-pack |
| 0700900704 | ADF flip shell (without dial/battery) |
| 0700900705 | External digital dial and battery assembly |
| 0700900706 | Inner cover lens 5-pack |
Note: The A70 Pro parts are entirely separate from A50 and A60 series parts. Sentinel A50 and A60 use CR2450 coin-cell batteries (not rechargeable lithium). Sentinel A50 and A60 cover lenses are also different dimensions from the A70 Pro. Do not cross-order parts between the A50/A60 and A70 Pro.
A70 Pro Specifications
- Power: Rechargeable lithium battery (USB-C charging)
- ADF design: Flip-up assembly with external digital dial
- Shade range: Variable shade, weld and grind modes
- Application: Industrial welding and fabrication
- Included in package: Helmet assembly, replacement ADF cover lenses, rear FR head covering, front FR chest cover, carry bag, LED work light with AA battery, USB-C charging cable
The comprehensive package contents reflect the A70 Pro’s positioning as a complete industrial protection solution rather than a basic helmet.
How the A70 Pro Differs from the Sentinel A60
Welders familiar with the Sentinel A60 will notice several key differences in the A70 Pro:
Battery: The A60 uses two CR2450 coin cells that are physically replaced. The A70 Pro uses an integrated rechargeable lithium pack charged via USB-C. The A70 Pro eliminates the need to stock replacement coin cells, but the battery becomes a more significant service item when it eventually degrades.
Flip-up ADF: The A70 Pro has a physical flip mechanism that raises the entire ADF assembly for grinding and non-welding work. The A60 does not have this feature. The flip mechanism adds versatility but also adds mechanical complexity.
External dial: The rotary dial on the A70 Pro sits on the outside of the ADF assembly and is operated with a thumb or finger through a welding glove. The A60 uses internal digital controls accessed by tipping the helmet. The A70 Pro dial is significantly easier to adjust mid-task.
Industrial positioning: The A70 Pro targets heavy fabrication and industrial environments with its robust build, FR accessories in the box, and LED work light. The A60 is a professional-grade helmet but is more broadly positioned.
Where to Buy A70 Pro Parts
- esab.com - official ESAB product page with full parts listing
- Baker’s Gas (bakersgas.com) - carries ESAB Sentinel A70 Pro and accessories
- Weldfabulous (weldfabulous.com) - ESAB authorized
- Welding Supplies from IOC (weldingsuppliesfromioc.com) - stocks A70 Pro flip shell
- ESAB authorized distributors nationwide
The A70 Pro is a newer product (introduced 2023-2024) compared to the A60, so availability at regional supply houses varies more than for established models. Online ordering from ESAB-authorized sources is reliable.
Maintenance Notes
Charging: Charge the battery (0700900705 assembly) fully before extended use periods. Use only the included USB-C cable or a certified USB-C cable. Do not leave the battery fully depleted in storage for extended periods, as deep-discharge can damage lithium cells.
Cover lenses: Replace the outer cover lens (0700900703) whenever spatter pitting or scratching reduces visibility. In heavy MIG work, this may be every few weeks. Inspect the inner cover lens (0700900706) regularly and replace when fogged.
Flip mechanism: Periodically check that the flip-up hinge operates smoothly and that the ADF locks into both the up and down positions without play. A loose hinge affects both ADF positioning and sensor alignment.
Frequently Asked Questions
Does the ESAB Sentinel A70 Pro use a CR2450 battery? No. Unlike the Sentinel A50 and A60, the A70 Pro uses an integrated rechargeable lithium battery charged via USB-C. The battery is part of the 0700900705 digital dial and battery assembly.
Can I use A60 cover lenses in the A70 Pro? No. The A70 Pro and A60 use different cover lens dimensions and part numbers. The A70 Pro uses 0700900703 (outer, 5-pack) and 0700900706 (inner, 5-pack).
What does the flip-up ADF on the A70 Pro do? The entire ADF assembly flips upward, allowing the welder to see clearly for fit-up, grinding, inspection, and non-welding work without removing the helmet. A shade 3 or clear grinding shield position is maintained when the ADF is flipped up.
Where is the USB-C charging port on the A70 Pro? On the external digital dial and battery assembly (0700900705) mounted on the ADF flip shell. The USB-C port is accessible on the side of this assembly.
How long does the A70 Pro battery last per charge? ESAB’s specifications indicate the A70 Pro is designed for industrial shift use. Specific runtime hours depend on use conditions. Charge fully before a shift and keep the USB-C cable accessible for top-up charges during breaks on long shift days.
Is the A70 Pro ADF covered by ESAB warranty? ESAB provides standard warranty coverage on the A70 Pro. Consult ESAB’s current warranty terms at esab.com or through your distributor for the specific coverage period and conditions.
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